World heavyweight boxing championship records and statistics

Below is a list of world heavyweight boxing championship records and statistics.

Championship recognition

As per International Boxing Hall Of Fame:[1]

1884–1921

• Champions were recognized by public acclamation. A champion in that era was a fighter who had a notable win over another fighter and kept winning afterward. It was a lineal championship. The only way to win the championship was to beat the current champion. Retirements or disputed results could lead to a championship being split among several men for periods of time. With only minor exceptions, the heavyweight division remained free from dual title-holders until the 1960s. For an early example, see the 1896 World Heavyweight Championship.

Sanctioning organizations: 1921–present

• 
  WBA world championship
• 
  WBC world championship
• 
  IBF world championship
• 
  WBO world championship
• 
  The Ring world championship

Gradually, the role of recognizing champions in the division evolved into a more formal affair, with public acclamation being supplemented (or in some cases, contradicted) by recognition by one or more athletic commissions, sanctioning organizations, or a combination of them. The most notable examples with respect to the heavyweight division have included:

• The New York State Athletic Commission (NYSAC). A governmental entity initially formed for the purpose of regulating boxing in the State of New York, thanks to New York's place as the epicenter of boxing from the 1930s through 1950s, the NYSAC expanded its reach to sanctioning championship bouts. This practice continued until, like the IBU, the NYSAC became a member of the WBC.
• The National Boxing Association (NBA) was organized in 1921. In 1962, the organization was renamed the World Boxing Association (WBA).
• The WBC was organized in 1963.
• The IBF, which was founded in 1983 by the members of the United States Boxing Association after the USBA withdrew from membership in the WBA.
• The WBO, which was founded in 1989 by disgruntled members of the WBC.

There are also titles that aren't considered major but play a significant role in legitimizing the heavyweight champion:

• The Ring began awarding championship belts in 1922, stopped giving belts to world champions in the 1990s, then reintroduced their title in 2002, and ignored the current ongoing world championship lineage. Under the original version of the policy, you could win the title by either defeating the reigning champion or winning a box-off between the magazine's No. 1 and No. 2 (occasionally No. 3) ranked contenders. A fighter could not be stripped of the title unless he lost or retired. Since May 2012, under the new policy, The Ring title can be awarded when the No. 1 and No. 2 contenders face each other or when either of them faces No. 3, No. 4 or No. 5 contender. In addition, the title can be taken away by losing the fight, not scheduling a fight for 18 months, not scheduling a fight with a top 5 contender for two years, or retiring.[2]

Most opponents beaten in title fights

• 
  Wladimir Klitschko
• 
  Joe Louis
• 
  Muhammad Ali
• 
  Larry Holmes
• 
  Lennox Lewis

Keys:

     Active title reign

     Reign has ended

Note 1: WBA (Regular) champions are not included

Note 2: WBO heavyweight title bouts before August 1997 are not included[3]

All championship reigns

Map of countries, number of beaten opponents in world heavyweight boxing championship fights reached by country citizen (as of February 2020). Note: interim titles, as well as WBA's secondary belts (Regular, Gold etc.) are not included

The list does not include The Ring and lineal championship fights after 1921.

Pos.	Name	Reign began-ended	Recognition	Beaten opponents	Fights
1.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. WBA, IBF, WBO	23	[4]
2.	Joe Louis	June 22, 1937 — March 1, 1949	NYSAC, NBA	22	[5][6]
3.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. WBA, WBC 2. WBA, WBC 3. WBA	21	[7]
4.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	20	[8]
5.	Lennox Lewis	1. December 14, 1992 — September 24, 1994 2. February 7, 1997 — April 22, 2001 3. November 17, 2001 — February 6, 2004	1. WBC 2. WBA, WBC, IBF 3. WBC, IBF	15	[9]
5.	Vitali Klitschko	1. June 26, 1999 — April 1, 2000 2. April 24, 2004 — November 9, 2005 3. October 11, 2008 — December 15, 2013	1. WBO 2. WBC 3. WBC	15	[10]
7.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. WBA, WBC, IBF 2. WBA, WBC	11	[11]
7.	Tommy Burns	February 23, 1906 — December 26, 1908	lineal	11	[12]
9.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	10	[13]
10.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999 4. August 12, 2000 — March 3, 2001	1. WBA, WBC, IBF 2. WBA, IBF 3. WBA, IBF 4. WBA	9	[14]
11.	Ezzard Charles	September 27, 1950 — July 18, 1951	NBA, NYSAC	8	[15]
11.	Deontay Wilder	January 17, 2015 — February 22, 2020	WBC	8	[16]
11.	Anthony Joshua	1. April 9, 2016 — June 1, 2019 2. December 7, 2019 — present	WBA, IBF, WBO	8	[17]
14.	Floyd Patterson	1. November 30, 1956 — June 26, 1959 2. June 20, 1960 — September 25, 1962	NYSAC, NBA	7	[18]
15.	Jack Johnson	December 26, 1908 — April 5, 1915	lineal	6	[19]
15.	Jack Dempsey	July 4, 1919 — September 23, 1926	lineal-to-NBA and NYSAC	6	[20]
15.	James J. Jeffries	June 9, 1899 — May 13, 1905	lineal	6	[21]

All championship reigns of undisputed champions/lineal champions/The Ring champions

Map of countries, number of beaten opponents in world heavyweight boxing championship fights reached by country citizen - undisputed champion (1922-), lineal champion (1885–1921), The Ring champion (1922-1989, 2002-) (as of May 2020). Note: interim titles, as well as WBA's secondary belts (Regular, Gold etc.) are not included

The list does not include The Ring and lineal championship fights after 1921, although it only includes heavyweight champions that captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

Pos.	Name	Reign began-ended	Recognition	Beaten opponents	Fights
1.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. WBA, IBF, WBO	23	[4]
2.	Joe Louis	June 22, 1937 — March 1, 1949	NYSAC, NBA	22	[5][6]
3.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. WBA, WBC 2. WBA, WBC 3. WBA	21	[7]
4.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	20	[8]
5.	Lennox Lewis	1. December 14, 1992 — September 24, 1994 2. February 7, 1997 — April 22, 2001 3. November 17, 2001 — February 6, 2004	1. WBC 2. WBA, WBC, IBF 3. WBC, IBF	15	[9]
5.	Vitali Klitschko	1. June 26, 1999 — April 1, 2000 2. April 24, 2004 — November 9, 2005 3. October 11, 2008 — December 15, 2013	1. WBO 2. WBC 3. WBC	15	[10]
7.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. WBA, WBC, WBA 2. WBA, WBC	11	[11]
7.	Tommy Burns	February 23, 1906 — December 26, 1908	lineal	11	[12]
9.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	10	[13]
10.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999 4. August 12, 2000 — March 3, 2001	1. WBA, WBC, IBF 2. WBA, IBF 3. WBA, IBF 4. WBA	9	[14]
11.	Ezzard Charles	September 27, 1950 — July 18, 1951	NBA, NYSAC	8	[15]
12.	Floyd Patterson	1. November 30, 1956 — June 26, 1959 2. June 20, 1960 — September 25, 1962	NYSAC, NBA	7	[18]
12.	Jack Johnson	December 26, 1908 — April 5, 1915	lineal	7	[19]
14.	James J. Jeffries	June 9, 1899 — May 13, 1905	lineal	6	[21]
14.	Jack Dempsey	July 4, 1919 — September 23, 1926	lineal-to-NBA and NYSAC	6	[20]

Championship reigns of undisputed champions/lineal champions/The Ring champions with successful unifications/victories over champions

Diagram that represents top 25 world heavyweight champions by number of opponents beaten for the world heavyweight title (as of July 2020)

The list does not include The Ring and lineal championship fights after 1921, although it only includes heavyweight champions that captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

The list only includes title reigns during which the champion:

• has won undisputed championship (1922–present), The Ring championship (1922–1989, 2002–), lineal championship (1885–1921)
• unified[22][23][24] the titles
• defeated a fighter that either had to drop his own world title prior to the fight due to organization's championship policy or would later become the world champion whilst the winner's reign was still active

As of August 10, 2020.

Pos.	Name	Reign began-ended	Recognition	Additional recognition	Beaten champions (recognition)	Beaten opponents	Fights
1.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. unified	2. The Ring	1. Chris Byrd (IBF)	23	[4][25]
2.	Joe Louis	June 22, 1937 — March 1, 1949	undisputed	The Ring		22	[5][6]
3.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. undisputed 2. undisputed 3. WBA	The Ring		21	[7]
4.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC-to-IBF	The Ring	Mike Weaver (WBA), Tim Witherspoon (WBC)	20	[8][26][27]
5.	Lennox Lewis	1. February 7, 1997 — April 22, 2001 2. November 17, 2001 — February 6, 2004	1. undisputed 2. unified	2. The Ring	1. Evander Holyfield (WBA)	12	[9][14]
6.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. undisputed 2. unified	1. The Ring		11	[11]
6.	Tommy Burns	February 23, 1906 — December 26, 1908	lineal	lineal		11	[12]
8.	Joe Frazier	March 4, 1968 — January 22, 1973	undisputed	The Ring		10	[13]
9.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999	1. undisputed 2. unified 3. unified			8	[14]
9.	Ezzard Charles	September 27, 1950 — July 18, 1951	undisputed	The Ring		8	[15]
11.	Floyd Patterson	1. November 30, 1956 — June 26, 1959 2. June 20, 1960 — September 25, 1962	undisputed	The Ring		7	[18]
12.	Jack Johnson	December 26, 1908 — April 5, 1915	lineal	lineal		6	[19]
12.	James J. Jeffries	June 9, 1899 — May 13, 1905	lineal	lineal		6	[21]
12.	Jack Dempsey	July 4, 1919 — September 23, 1926	undisputed	The Ring		6	[20]
15.	Rocky Marciano	September 23, 1952 — April 27, 1956	undisputed	The Ring		5	[28]
15.	George Foreman	1. January 22, 1973 — October 30, 1974 2. November 4, 1994 — June 29, 1995	1. undisputed 2. unified	1. The Ring		5	[29]
17.	Primo Carnera	June 29, 1933 – June 14, 1934	undisputed	The Ring		3	[30]
17.	Riddick Bowe	November 13, 1992 — November 6, 1993	undisputed			3	[31]
19.	James J. Corbett	September 7, 1892 – March 17, 1897	lineal	lineal		2	[32]
19.	Jess Willard	April 5, 1915 — July 4, 1919	lineal	lineal		2	[33]
19.	Max Schmeling	June 12, 1930 – January 7, 1931	undisputed	The Ring		2	[34]
19.	Vitali Klitschko	April 24, 2004 — November 9, 2005	WBC	The Ring	Corrie Sanders (WBO)	2	[10][35]
19.	Tyson Fury	1. November 28, 2015 — October 12, 2016 2. February 22, 2020 — present	1. unified 2. WBC	1. The Ring 2. The Ring		2	[36]
19.	Gene Tunney	September 23, 1926 – July 31, 1928	undisputed	The Ring		2	[37]
19.	Michael Spinks	September 21, 1985 — February 19, 1987	IBF	The Ring		2	[38]
26.	John L. Sullivan	August 29, 1885 — September 7, 1892	lineal	lineal		1	[39]
26.	Bob Fitzsimmons	March 17, 1897 — June 9, 1899	lineal	lineal		1	[40]
26.	Marvin Hart	July 3, 1905 — February 23, 1906	lineal	lineal		1	[41]
26.	Max Baer	June 14, 1934 — June 13, 1935	undisputed	The Ring		1	[42]
26.	James J. Braddock	June 13, 1935 — June 22, 1937	undisputed	The Ring		1	[43]
26.	Jersey Joe Walcott	July 18, 1951 — September 23, 1952	undisputed	The Ring		1	[44]
26.	Ingemar Johansson	June 26, 1959 — June 20, 1960	undisputed	The Ring		1	[45]
26.	Sonny Liston	September 25, 1962 — February 25, 1964	undisputed	The Ring		1	[46]
26.	Leon Spinks	February 15, 1978 — September 15, 1978	undisputed	The Ring		1	[47]
26.	Buster Douglas	February 11, 1990 — October 25, 1990	undisputed			1	[48]

Most wins in title fights

Keys:

     Active title reign

     Reign has ended

Note 1: WBA (Regular) champions are not included

Note 2: WBO heavyweight title bouts before August 1997 are not included[3]

All championship reigns

The list does not include The Ring and lineal championship fights after 1921.

Pos.	Name	Reign began-ended	Recognition	Title fight wins	Fights
1.	Joe Louis	June 22, 1937 — March 1, 1949	NYSAC, NBA	27	[5][6]
2.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. WBA, IBF, WBO	25	[4]
3.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. WBA, WBC 2. WBA, WBC 3. WBA	22	[7]
4.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	20	[8]
5.	Lennox Lewis	1. December 14, 1992 — September 24, 1994 2. February 7, 1997 — April 22, 2001 3. November 17, 2001 — February 6, 2004	1. WBC 2. WBA, WBC, IBF 3. WBC, IBF	15	[9]
5.	Vitali Klitschko	1. June 26, 1999 — April 1, 2000 2. April 24, 2004 — November 9, 2005 3. October 11, 2008 — December 15, 2013	1. WBO 2. WBC 3. WBC	15	[10]
7.	Tommy Burns	February 23, 1906 — December 26, 1908	lineal	13	[12]
8.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. WBA, WBC, WBA 2. WBA, WBC	12	[11]
9.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	10	[13]
9.	Deontay Wilder	January 17, 2015 — February 22, 2020	WBC	10	[16]
9.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999 4. August 12, 2000 — March 3, 2001	1. WBA, WBC, IBF 2. WBA, IBF 3. WBA, IBF 4. WBA	10	[14]
12.	Ezzard Charles	September 27, 1950 — July 18, 1951	NBA, NYSAC	9	[15]
13.	Floyd Patterson	1. November 30, 1956 — June 26, 1959 2. June 20, 1960 — September 25, 1962	NYSAC, NBA	8	[18]
13.	James J. Jeffries	June 9, 1899 — May 13, 1905	lineal	8	[21]
13.	Anthony Joshua	1. April 9, 2016 – June 1, 2019 2. December 7, 2019 – present	WBA, IBF, WBO	8	[17]

All championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes heavyweight champions that captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

Pos.	Name	Reign began-ended	Recognition	Title fight wins	Fights
1.	Joe Louis	June 22, 1937 — March 1, 1949	NYSAC, NBA	27	[5][6]
2.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. WBA, IBF, WBO	25	[4]
3.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. WBA, WBC 2. WBA, WBC 3. WBA	22	[7]
4.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	20	[8]
5.	Lennox Lewis	1. December 14, 1992 — September 24, 1994 2. February 7, 1997 — April 22, 2001 3. November 17, 2001 — February 6, 2004	1. WBC 2. WBA, WBC, IBF 3. WBC, IBF	15	[9]
5.	Vitali Klitschko	1. June 26, 1999 — April 1, 2000 2. April 24, 2004 — November 9, 2005 3. October 11, 2008 — December 15, 2013	1. WBO 2. WBC 3. WBC	15	[10]
7.	Tommy Burns	February 23, 1906 — December 26, 1908	lineal	13	[12]
8.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. WBA, WBC, IBF 2. WBC, WBA	12	[11]
9.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	10	[13]
9.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999 4. August 12, 2000 — March 3, 2001	1. WBA, WBC, IBF 2. WBA, IBF 3. WBA, IBF 4. WBA	10	[14]
11.	Ezzard Charles	September 27, 1950 — July 18, 1951	NBA, NYSAC	9	[15]
12.	Floyd Patterson	1. November 30, 1956 — June 26, 1959 2. June 20, 1960 — September 25, 1962	NYSAC, NBA	8	[18]
12.	James J. Jeffries	June 9, 1899 — May 13, 1905	lineal	8	[21]
14.	Rocky Marciano	September 23, 1952 — April 27, 1956	NYSAC, NBA	7	[28]
15.	Jack Dempsey	July 4, 1919 — September 23, 1926	NYSAC, NBA	6	[20]
15.	Jack Johnson	December 26, 1908 — April 5, 1915	lineal	6	[19]

Championship reigns of undisputed champions/lineal champions/The Ring champions with successful unifications/victories over champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes heavyweight champions that captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

The list only includes title reigns during which the champion:

• has won undisputed championship (1922–present), The Ring championship (1922–1989, 2002–), lineal championship (1885–1921)
• unified[22][23][24] the titles
• defeated a fighter that either had to drop his own world title prior to the fight due to organization's championship policy or would later become the world champion whilst the winner's reign was still active

As of August 10, 2020.

Pos.	Name	Reign began-ended	Recognition	Additional recognition	Beaten champions (recognition)	Title fight wins	Fights
1.	Joe Louis	June 22, 1937 — March 1, 1949	undisputed	The Ring		27	[5][6]
2.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. unified	2. The Ring	1. Chris Byrd (IBF)	25	[4][25]
3.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. undisputed 2. undisputed 3. WBA	1. The Ring 2. The Ring 3. The Ring		22	[7]
4.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC-to-IBF	The Ring	Mike Weaver (WBA), Tim Witherspoon (WBC)	20	[8][26][27]
5.	Tommy Burns	February 23, 1906 — December 26, 1908	lineal	lineal		13	[12]
6.	Lennox Lewis	1. February 7, 1997 — April 22, 2001 2. November 17, 2001 — February 6, 2004	1. undisputed 2. unified	2. The Ring	1. Evander Holyfield (WBA)	12	[9][14]
6.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. undisputed 2. unified	1. The Ring		12	[11]
8.	Joe Frazier	March 4, 1968 — January 22, 1973	unified	The Ring		10	[13]
9.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999	1. undisputed 2. unified 3. unified			9	[14]
9.	Ezzard Charles	September 27, 1950 — July 18, 1951	undisputed	The Ring		9	[15]
11.	Floyd Patterson	1. November 30, 1956 — June 26, 1959 2. June 20, 1960 — September 25, 1962	undisputed	The Ring		8	[18]
11.	James J. Jeffries	June 9, 1899 — May 13, 1905	lineal	lineal		8	[21]
13.	Rocky Marciano	September 23, 1952 — April 27, 1956	undisputed	The Ring		7	[28]
14.	Jack Dempsey	July 4, 1919 — September 23, 1926	undisputed	The Ring		6	[20]
14.	Jack Johnson	December 26, 1908 — April 5, 1915	lineal	lineal		6	[19]
16.	George Foreman	1. January 22, 1973 — October 30, 1974 2. November 4, 1994 — June 29, 1995	1. undisputed 2. unified	1. The Ring		5	[29]
17.	Primo Carnera	June 29, 1933 – June 14, 1934	undisputed	The Ring		3	[30]
17.	Riddick Bowe	November 13, 1992 — November 6, 1993	undisputed			3	[31]
17.	Gene Tunney	September 23, 1926 – July 31, 1928	undisputed	The Ring		3	[37]
17.	Michael Spinks	September 21, 1985 — February 19, 1987	IBF	The Ring		3	[38]
21.	James J. Corbett	September 7, 1892 – March 17, 1897	lineal	lineal		2	[32]
21.	Jess Willard	April 5, 1915 — July 4, 1919	lineal	lineal		2	[33]
21.	Max Schmeling	June 12, 1930 – January 7, 1931	undisputed	The Ring		2	[34]
21.	Vitali Klitschko	April 24, 2004 — November 9, 2005	WBC	The Ring	Corrie Sanders (WBO)	2	[10][35]
21.	Tyson Fury	1. November 28, 2015 — October 12, 2016 2. February 22, 2020 — present	1. unified 2. WBC	1. The Ring 2. The Ring		2	[36]
21.	Jersey Joe Walcott	July 18, 1951 — September 23, 1952	undisputed	The Ring		2	[44]
21.	Sonny Liston	September 25, 1962 — February 25, 1964	undisputed	The Ring		2	[46]
28.	John L. Sullivan	August 29, 1885 — September 7, 1892	lineal	lineal		1	[39]
28.	Bob Fitzsimmons	March 17, 1897 — June 9, 1899	lineal	lineal		1	[40]
28.	Marvin Hart	July 3, 1905 — February 23, 1906	lineal	lineal		1	[41]
28.	Max Baer	June 14, 1934 — June 13, 1935	undisputed	The Ring		1	[42]
28.	James J. Braddock	June 13, 1935 — June 22, 1937	undisputed	The Ring		1	[43]
28.	Ingemar Johansson	June 26, 1959 — June 20, 1960	undisputed	The Ring		1	[45]
28.	Leon Spinks	February 15, 1978 — September 15, 1978	undisputed	The Ring		1	[47]
28.	Buster Douglas	February 11, 1990 — October 25, 1990	undisputed			1	[48]

Most opponents beaten during one title reign

Keys:

     Active title reign

     Reign has ended

Note 1: WBA (Regular) champions are not included

Note 2: WBO heavyweight title bouts before August 1997 are not included[3]

All championship reigns

The list does not include The Ring and lineal championship fights after 1921. For the purpose of this list, successful title defenses that ended in a draw are also included.

Pos.	Name	Reign began-ended	Recognition	Beaten opponents	Fights
1.	Joe Louis	June 22, 1937 — March 1, 1949	NYSAC, NBA	21	[5][6]
2.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	19	[8]
3.	Wladimir Klitschko	April 22, 2006 — November 28, 2015	WBA, IBF, WBO	17	[4]
4.	Tommy Burns	February 23, 1906 — December 26, 1908	lineal	11	[12]
5.	Muhammad Ali	October 30, 1974 — February 15, 1978	WBA, WBC	10	[7]
6.	Mike Tyson	November 22, 1986 — February 11, 1990	WBA, WBC, IBF	9	[11]
6.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	9	[13]
6.	Deontay Wilder	January 17, 2015 – February 22, 2020	WBC	9	[16]
9.	Lennox Lewis	February 7, 1997 — April 22, 2001	WBA, WBC, IBF	8	[9]
9.	Ezzard Charles	September 27, 1950 — July 18, 1951	NBA, NYSAC	8	[15]
11.	Anthony Joshua	April 9, 2016 – June 1, 2019	WBA, IBF, WBO	6	[17]
11.	James J. Jeffries	June 9, 1899 — May 13, 1905	lineal	6	[21]
11.	Jack Johnson	December 26, 1908 — April 5, 1915	lineal	6	[19]
14.	Rocky Marciano	September 23, 1952 — April 27, 1956	NYSAC, NBA	5	[28]
14.	Jack Dempsey	July 4, 1919 — September 23, 1926	lineal-to-NBA and NYSAC	5	[20]

Championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes title reigns during which the champion captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–). For the purpose of this list, successful title defenses that ended in a draw are also included.

Pos.	Name	Reign began-ended	Recognition	Beaten opponents	Fights
1.	Joe Louis	June 22, 1937 — March 1, 1949	NYSAC, NBA	21	[5][6]
2.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	19	[8]
3.	Wladimir Klitschko	April 22, 2006 — November 28, 2015	WBA, IBF, WBO	17	[4]
4.	Tommy Burns	February 23, 1906 — December 26, 1908	lineal	11	[12]
5.	Muhammad Ali	October 30, 1974 — February 15, 1978	WBA, WBC	10	[7]
6.	Mike Tyson	November 22, 1986 — February 11, 1990	WBA, WBC, IBF	9	[11]
6.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	9	[13]
8.	Lennox Lewis	February 7, 1997 — April 22, 2001	WBA, WBC, IBF	8	[9]
8.	Ezzard Charles	September 27, 1950 — July 18, 1951	NBA, NYSAC	8	[15]
10.	James J. Jeffries	June 9, 1899 — May 13, 1905	lineal	6	[21]
10.	Jack Johnson	December 26, 1908 — April 5, 1915	lineal	6	[19]
12.	Rocky Marciano	September 23, 1952 — April 27, 1956	NYSAC, NBA	5	[28]
12.	Jack Dempsey	July 4, 1919 — September 23, 1926	lineal-to-NBA and NYSAC	5	[20]

Most consecutive title defenses

Keys:

     Active title reign

     Reign has ended

Note 1: WBA (Regular) champions are not included

Note 2: WBO heavyweight title bouts before August 1997 are not included[3]

All championship reigns

The list does not include The Ring and lineal championship fights after 1921. For the purpose of this list, successful title defenses that ended in a draw are also included.

Pos.	Name	Reign began-ended	Recognition	Title defenses	Fights
1.	Joe Louis	June 22, 1937 — March 1, 1949	NYSAC, NBA	26	[5][6]
2.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	19	[8]
3.	Wladimir Klitschko	April 22, 2006 — November 28, 2015	WBA, IBF, WBO	18	[4][49]
4.	Tommy Burns	February 23, 1906 — December 26, 1908	lineal	13	[12]
5.	Muhammad Ali	October 30, 1974 — February 15, 1978	WBA, WBC	10	[7]
5.	Deontay Wilder	January 17, 2015 – February 22, 2020	WBC	10	[16]
7.	Mike Tyson	November 22, 1986 — February 11, 1990	WBA, WBC, IBF	9	[11]
7.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	9	[13]
7.	Lennox Lewis	February 7, 1997 — April 22, 2001	WBA, WBC, IBF	9	[9]
10.	Ezzard Charles	September 27, 1950 — July 18, 1951	NBA, NYSAC	8	[15]
11.	James J. Jeffries	June 9, 1899 — May 13, 1905	lineal	7	[21]
12.	Rocky Marciano	September 23, 1952 — April 27, 1956	NYSAC, NBA	6	[28]
12.	Anthony Joshua	April 9, 2016 – June 1, 2019	WBA, IBF, WBO	6	[17]
12.	Jack Johnson	December 26, 1908 — April 5, 1915	lineal	6	[19]
15.	Jack Dempsey	July 4, 1919 — September 23, 1926	lineal-to-NBA and NYSAC	5	[20]

Championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes title reigns during which the champion captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–). For the purpose of this list, successful title defenses that ended in a draw are also included.

Pos.	Name	Reign began-ended	Recognition	Title defenses	Fights
1.	Joe Louis	June 22, 1937 — March 1, 1949	NYSAC, NBA	26	[5][6]
2.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	19	[8]
3.	Wladimir Klitschko	April 22, 2006 — November 28, 2015	WBA, IBF, WBO	18	[4]
4.	Tommy Burns	February 23, 1906 — December 26, 1908	lineal	13	[12]
5.	Muhammad Ali	October 30, 1974 — February 15, 1978	WBA, WBC	10	[7]
6.	Mike Tyson	November 22, 1986 — February 11, 1990	WBA, WBC, IBF	9	[11]
6.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	9	[13]
6.	Lennox Lewis	February 7, 1997 — April 22, 2001	WBA, WBC, IBF	9	[13]
9.	Ezzard Charles	September 27, 1950 — July 18, 1951	NBA, NYSAC	8	[15]
10.	James J. Jeffries	June 9, 1899 — May 13, 1905	lineal	7	[21]
11.	Rocky Marciano	September 23, 1952 — April 27, 1956	NYSAC, NBA	6	[28]
11.	Jack Johnson	December 26, 1908 — April 5, 1915	lineal	6	[19]
13.	Jack Dempsey	July 4, 1919 — September 23, 1926	lineal-to-NBA and NYSAC	5	[20]

Longest title reigns

Keys:

     Active Title Reign

     Reign has ended

Note 1: WBA (Regular) champions are not included

Note 2: WBO heavyweight title bouts before August 1997 are not included[3]

Combined reigns

All championship reigns

The list does not include The Ring and lineal championship fights after 1921.

As of 22 February 2020.

Pos.	Name	Combined reign	Days as champion	Number of reigns	Title recognition
1.	Wladimir Klitschko	12 years, 0 months, 0 days	4 382	2	WBA, IBF, WBO
2.	Joe Louis	11 years, 8 months, 8 days	4 270	1	NYSAC, NBA
3.	Muhammad Ali	9 years, 5 months, 5 days	3 443	3	NYSAC, WBA, WBC
4.	Lennox Lewis	8 years, 5 months, 13 days	3 086	3	WBA, WBC, IBF
5.	Vitali Klitschko	7 years, 5 months, 28 days	2 735	3	WBC, WBO
6.	Larry Holmes	7 years, 3 months, 12 days	2 661	1	WBC, IBF
7.	Jack Dempsey	7 years, 2 months, 19 days	2 638	1	NYSAC, NBA
8.	John L. Sullivan	7 years, 0 months, 10 days	2 566	1	lineal
9.	Jack Johnson	6 years, 3 months, 11 days	2 292	1	lineal
10.	Evander Holyfield	6 years, 1 month, 1 day	2 223	4	WBA, WBC, IBF
11.	James J. Jeffries	5 years, 11 months, 4 days	2 156	1	lineal
12.	Deontay Wilder	5 years, 1 months, 5 days	1 859	1	WBC
13.	Joe Frazier	4 years, 10 months, 18 days	1 785	1	NYSAC, WBA, WBC
14.	Floyd Patterson	4 years, 10 months, 0 days	1 765	2	NYSAC, NBA
15.	James J. Corbett	4 years, 6 months, 10 days	1 652	1	lineal

All championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes heavyweight champions that captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

As of 20 February 2020.

Pos.	Name	Combined reign	Days as champion	Number of reigns	Title recognition
1.	Wladimir Klitschko	12 years, 0 months, 0 days	4 382	2	WBA, IBF, WBO
2.	Joe Louis	11 years, 8 months, 8 days	4 270	1	NYSAC, NBA
3.	Muhammad Ali	9 years, 5 months, 5 days	3 443	3	NYSAC, WBA, WBC
4.	Lennox Lewis	8 years, 5 months, 13 days	3 086	3	WBA, WBC, IBF
5.	Vitali Klitschko	7 years, 5 months, 28 days	2 735	3	WBC, WBO
6.	Larry Holmes	7 years, 3 months, 12 days	2 661	1	WBC, IBF
7.	Jack Dempsey	7 years, 2 months, 19 days	2 638	1	NYSAC, NBA
8.	John L. Sullivan	7 years, 0 months, 10 days	2 566	1	lineal
9.	Jack Johnson	6 years, 3 months, 11 days	2 292	1	lineal
10.	Evander Holyfield	6 years, 1 month, 1 day	2 223	4	WBA, WBC, IBF
11.	James J. Jeffries	5 years, 11 months, 4 days	2 156	1	lineal
12.	Joe Frazier	4 years, 10 months, 18 days	1 785	1	NYSAC, WBA, WBC
13.	Floyd Patterson	4 years, 10 months, 0 days	1 765	2	NYSAC, NBA
14.	James J. Corbett	4 years, 6 months, 10 days	1 652	1	lineal
15.	Jess Willard	4 years, 2 months, 29 days	1 551	1	lineal

Vitali Klitschko (right) retired as champion in 2005. Following his retirement, the WBC conferred "champion emeritus" status on Klitschko, and assured him he would become the mandatory challenger if and when he decided to return

Championship reigns of undisputed champions/lineal champions/The Ring champions with successful unifications/victories over champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes heavyweight champions that captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

The list only includes title reigns during which the champion:

• has won undisputed championship (1922–present), The Ring championship (1922–1989, 2002–), lineal championship (1885–1921)
• unified[22][23][24] the titles
• defeated a fighter that either had to drop his own world title prior to the fight due to organization's championship policy or would later become the world champion whilst the winner's reign was still active

As of 20 February 2020.

Pos.	Name	Combined reign	Days as champion	Number of reigns	Title recognition
1.	Wladimir Klitschko	12 years, 0 months, 0 days	4 382	2	WBA, IBF, WBO
2.	Joe Louis	11 years, 8 months, 8 days	4 270	1	NYSAC, NBA
3.	Muhammad Ali	9 years, 5 months, 5 days	3 443	3	NYSAC, WBA, WBC
4.	Larry Holmes	7 years, 3 months, 12 days	2 661	1	WBC, IBF
5.	Jack Dempsey	7 years, 2 months, 19 days	2 638	1	NYSAC, NBA
6.	John L. Sullivan	7 years, 0 months, 10 days	2 566	1	lineal
7.	Lennox Lewis	6 years, 8 months, 3 days	2 437	2	WBA, WBC, IBF
8.	Jack Johnson	6 years, 3 months, 11 days	2 292	1	lineal
9.	James J. Jeffries	5 years, 11 months, 4 days	2 156	1	lineal
10.	Evander Holyfield	5 years, 6 months, 12 days	2 020	3	WBA, WBC, IBF
11.	Joe Frazier	4 years, 10 months, 18 days	1 785	1	NYSAC, WBA, WBC
12.	Floyd Patterson	4 years, 10 months, 0 days	1 765	2	NYSAC, NBA
13.	James J. Corbett	4 years, 6 months, 10 days	1 652	1	lineal
14.	Jess Willard	4 years, 2 months, 29 days	1 551	1	lineal
15.	Mike Tyson	3 years, 10 months, 16 days	1 415	2	WBA, WBC, IBF

Individual reigns

Below is a list of longest reigning heavyweight champions in boxing measured by the individual's longest reign. Both The Ring and lineal championships are included. Career total time as champion (for multiple time champions) does not apply.

All championship reigns

Pos.	Name	Title Reign	Title recognition
1.	Joe Louis	11 years, 8 months, 8 days	lineal
2.	Wladimir Klitschko	9 years, 7 months and 6 days	IBF (+WBA, WBO, The Ring/Lineal)
3.	Larry Holmes	7 years, 3 months, 12 days	WBC-to-IBF (+The Ring/Lineal)
4.	Jack Dempsey	7 years, 2 months, 19 days	lineal
5.	John L. Sullivan	7 years, 0 months, 9 days	lineal
6.	Jack Johnson	6 years, 3 months, 10 days	lineal
7.	Muhammad Ali	5 years, 11 months, 9 days	The Ring/Lineal, (+WBA, WBC stripped)
8.	James J. Jeffries	5 years, 11 months, 4 days	lineal
9.	Vitali Klitschko	5 years, 2 months, 4 days	WBC
10.	Deontay Wilder	5 years, 1 month 5 days	WBC
11.	Joe Frazier	4 years, 10 months, 18 days	NYSAC (+WBA, WBC)
12.	James J. Corbett	4 years, 6 months, 10 days	lineal
13.	Jess Willard	4 years, 2 months, 29 days	lineal
14.	Lennox Lewis	4 years, 2 months, 15 days	WBC (+IBF, WBA stripped, The Ring/Lineal)
15.	Rocky Marciano	3 years, 11 months, 29 days	lineal

Championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes title reigns during which the champion captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

Pos.	Name	Title Reign	Title recognition
1.	Joe Louis	11 years, 8 months, 8 days	lineal
2.	Wladimir Klitschko	9 years, 7 months and 6 days	IBF (+WBA, WBO, The Ring/Lineal)
3.	Larry Holmes	7 years, 3 months, 12 days	WBC-to-IBF (+The Ring/Lineal)
4.	Jack Dempsey	7 years, 2 months, 19 days	lineal
5.	John L. Sullivan	7 years, 0 months, 9 days	lineal
6.	Jack Johnson	6 years, 3 months, 10 days	lineal
7.	Muhammad Ali	5 years, 11 months, 9 days	The Ring/Lineal, (+WBA, WBC stripped)
8.	James J. Jeffries	5 years, 11 months, 4 days	lineal
9.	Joe Frazier	4 years, 10 months, 18 days	NYSAC (+WBA, WBC)
10.	James J. Corbett	4 years, 6 months, 10 days	lineal
11.	Jess Willard	4 years, 2 months, 29 days	lineal
12.	Lennox Lewis	4 years, 2 months, 15 days	WBC (+IBF, WBA stripped, The Ring/Lineal)
13.	Rocky Marciano	3 years, 11 months, 29 days	lineal
14.	Mike Tyson	3 years, 2 months, 20 days	WBC (+WBA, IBF, The Ring)
15.	George Foreman	3 years, 0 months, 17 days	(+WBA, IBF stripped)

Title fight finishes

Quickest stoppages in title fights — 1st round stoppages

Note: WBO heavyweight title bouts before August 1997 are not included[3]

Date	Fight	Method	Round	Time	Title	Source(s)
April 18, 1998	Herbie Hide def. Damon Reed	TKO	1	0:52	WBO	[50]
May 21, 2005	Lamon Brewster def. Andrew Golota	TKO	1	0:52	WBO	[51]
November 14, 1944	Joe Louis def. Johnny Davis	KO	1	0:53	NYSAC	[5][6]
April 6, 1900	James J. Jeffries def. John Finnegan	KO	1	0:55	Lineal	[21]
December 10, 1982	Michael Dokes def. Mike Weaver	TKO	1	1:03	WBA	[26]
July 4, 1907	Tommy Burns def. Bill Squires	KO	1	1:28	Lineal	[12]
March 17, 1908	Tommy Burns def. Jem Roche	KO	1	1:28	Lineal	[12]
June 27, 1988	Mike Tyson def. Michael Spinks	KO	1	1:31	WBA, WBC, IBF	[11]
July 21, 1989	Mike Tyson def. Carl Williams	TKO	1	1:33	WBA, WBC, IBF	[11]
October 4, 1997	Lennox Lewis def. Andrew Golota	KO	1	1:35	WBC	[9]
April 22, 1969	Joe Frazier def. Dave Zyglewicz	KO	1	1:36	NYSAC	[13]
September 7, 1996	Mike Tyson def. Bruce Seldon	TKO	1	1:49	WBA	[11]
September 1, 1973	George Foreman def. José Roman	KO	1	2:00	WBA, WBC	[29]
June 22, 1938	Joe Louis def. Max Schmeling	KO	1	2:04	NBA, NYSAC	[5]
September 25, 1962	Sonny Liston def. Floyd Patterson	KO	1	2:06	NYSAC, WBA	[18]
September 18, 1946	Joe Louis def. Tami Mauriello	KO	1	2:09	NBA, NYSAC	[5]
July 22, 1963	Sonny Liston def. Floyd Patterson	KO	1	2:10	WBA, WBC	[18]
May 25, 1965	Muhammad Ali def. Sonny Liston	KO	1	2:12	WBC	[7]
December 12, 1986	James Smith def. Tim Witherspoon	KO	1	2:12	WBA	[52]
May 18, 2019	Deontay Wilder def. Dominic Breazeale	KO	1	2:17	WBC	[16]
March 28, 1906	Tommy Burns def. Jim O'Brien	KO	1	2:18	Lineal	[12]
February 6, 1993	Riddick Bowe def. Michael Dokes	TKO	1	2:19	WBA, IBF	[31]
April 17, 1939	Joe Louis def. Jack Roper	KO	1	2:20	NBA, NYSAC	[5]
May 15, 1953	Rocky Marciano def. Jersey Joe Walcott	KO	1	2:25	NBA, NYSAC	[28]
January 25, 1939	Joe Louis def. John Henry Lewis	KO	1	2:29	NBA, NYSAC	[5]
March 28, 1906	Tommy Burns def. James J. Walker	KO	1	2:55	Lineal	[12]
January 9, 1942	Joe Louis def. Buddy Baer	KO	1	2:56	NBA, NYSAC	[5]
November 4, 2017	Deontay Wilder def. Bermane Stiverne	KO	1	2:59	WBC	[16]
March 19, 2011	Vitali Klitschko def. Odlanier Solís	KO	1	2:59	WBC	[10]

Quickest stoppages in title fights — undisputed/The Ring/lineal/unified championship on the line

Note: WBO heavyweight title bouts before August 1997 are not included[3]

Date	Fight	Method	Round	Time	Title	Source(s)
November 14, 1944	Joe Louis def. Johnny Davis	KO	1	0:53	NYSAC	[5]
April 6, 1900	James J. Jeffries def. John Finnegan	KO	1	0:55	Lineal	[21]
July 4, 1907	Tommy Burns def. Bill Squires	KO	1	1:28	Lineal	[12]
March 17, 1908	Tommy Burns def. Jem Roche	KO	1	1:28	Lineal	[12]
June 27, 1988	Mike Tyson def. Michael Spinks	KO	1	1:31	WBA, WBC, IBF	[11]
July 21, 1989	Mike Tyson def. Carl Williams	TKO	1	1:33	WBA, WBC, IBF	[11]
September 1, 1973	George Foreman def. José Roman	KO	1	2:00	WBA, WBC	[29]
June 22, 1938	Joe Louis def. Max Schmeling	KO	1	2:04	NBA, NYSAC	[5]
September 25, 1962	Sonny Liston def. Floyd Patterson	KO	1	2:06	NYSAC, WBA	[18]
September 18, 1946	Joe Louis def. Tami Mauriello	KO	1	2:09	NBA, NYSAC	[5]
July 22, 1963	Sonny Liston def. Floyd Patterson	KO	1	2:10	WBA, WBC	[18]
May 25, 1965	Muhammad Ali def. Sonny Liston	KO	1	2:12	WBC	[7]
March 28, 1906	Tommy Burns def. Jim O'Brien	KO	1	2:18	Lineal	[12]
February 6, 1993	Riddick Bowe def. Michael Dokes	TKO	1	2:19	WBA, IBF	[31]
April 17, 1939	Joe Louis def. Jack Roper	KO	1	2:20	NBA, NYSAC	[5]
May 15, 1953	Rocky Marciano def. Jersey Joe Walcott	KO	1	2:25	NBA, NYSAC	[28]
January 25, 1939	Joe Louis def. John Henry Lewis	KO	1	2:29	NBA, NYSAC	[5]
March 28, 1906	Tommy Burns def. James J. Walker	KO	1	2:55	Lineal	[12]
January 9, 1942	Joe Louis def. Buddy Baer	KO	1	2:56	NBA, NYSAC	[5]
March 29, 1940	Joe Louis def. Johnny Paychek	TKO	2	0:15	NBA, NYSAC	[5]
May 22, 1993	Riddick Bowe def. Jesse Ferguson	KO	2	0:17	WBA	[31]
August 26, 1904	James J. Jeffries def. Jack Munroe	TKO	2	0:45	Lineal	[21]
November 18, 1970	Joe Frazier def. Bob Foster	KO	2	0:49	WBA, WBC	[13]
September 14, 1923	Jack Dempsey def. Luis Ángel Firpo	KO	2	0:57	NBA, NYSAC	[20]
February 17, 1941	Joe Louis def. Gus Dorazio	KO	2	1:30	NBA, NYSAC	[5]
March 26, 1974	George Foreman def. Ken Norton	TKO	2	2:00	WBA, WBC	[29]
January 22, 1973	George Foreman def. Joe Frazier	TKO	2	2:26	WBA, WBC	[29]
July 15, 2000	Lennox Lewis def. Francois Botha	TKO	2	2:39	WBC, IBF	[9]
April 29, 2000	Lennox Lewis def. Michael Grant	KO	2	2:53	WBC, IBF	[9]
March 21, 1988	Mike Tyson def. Tony Tubbs	TKO	2	2:54	WBA, WBC, IBF	[11]

Most opponents beaten for the title by stoppage

Keys:

     Active title reign

     Reign has ended

Note 1: WBO heavyweight title bouts before August 1997 are not included[3]

Note 2: The names in italics are champions that did not win undisputed championship (1922–present), The Ring championship (1922–1989, 2002–) or lineal championship (1885–1921)

	Name	Finished opponents	Fights
1.	Joe Louis	20	[5][6]
2.	Wladimir Klitschko	18	[4]
3.	Larry Holmes	14	[8]
4.	Muhammad Ali	13	[7]
5.	Vitali Klitschko	12	[10]
6.	Lennox Lewis	11	[9]
7.	Mike Tyson	9	[11]
7.	Deontay Wilder	9	[16]
7.	Tommy Burns	9	[12]
10.	Anthony Joshua	8	[17]
11.	Joe Frazier	8	[13]
12.	Floyd Patterson	7	[18]
13.	Rocky Marciano	5	[28]
13.	James J. Jeffries		[21]
13.	Ezzard Charles		[15]
13.	Jack Dempsey		[20]

Most title fight wins by stoppage

Keys:

     Active title reign

     Reign has ended

Note 1: WBO heavyweight title bouts before August 1997 are not included[3]

Note 2: The names in italics are champions that did not win undisputed championship (1922–present), The Ring championship (1922–1989, 2002–) or lineal championship (1885–1921)

	Name	Title fight finishes	Fights
1.	Joe Louis	24	[5][6]
2.	Wladimir Klitschko	19	[4]
3.	Muhammad Ali	14	[7]
3.	Larry Holmes	14	[20]
5.	Vitali Klitschko	12	[10]
6.	Lennox Lewis	11	[9]
6.	Tommy Burns	11	[12]
8.	Mike Tyson	10	[11]
9.	Deontay Wilder	9	[16]
10.	Joe Frazier	8	[13]
10.	Floyd Patterson	8	[18]
12.	Anthony Joshua	6	[17]
12.	Rocky Marciano	6	[28]
12.	James J. Jeffries	6	[21]
12.	Ezzard Charles	6	[15]
12.	Jack Dempsey	6	[20]

Champions by age

Keys:

     Active title reign

     Reign has ended

Note 1: WBA (Regular) champions are not included

Note 2: WBO heavyweight title bouts before August 1997 are not included[3]

Oldest champions

As of August 10, 2020.

This is the list of the oldest heavyweight champions ordered by age at their last day as champion.

All championship reigns

	Name	Recognition	Last day as champion	Age	Source(s)
1	George Foreman	IBF	June 29, 1995	46 years, 5 months, 18 days	[53]
2	Vitali Klitschko	WBC	December 16, 2013	42 years, 2 months, 26 days	[54]
3	Wladimir Klitschko	WBA, IBF, WBO	November 28, 2015	39 years, 8 months, 3 days	[4]
4	Oleg Maskaev	WBC	March 8, 2008	39 years, 6 days	[55]
5	Jersey Joe Walcott	NBA, NYSAC	September 23, 1952	38 years, 7 months, 23 days	[44]
6	Lennox Lewis	WBC	February 6, 2004	38 years, 5 months, 4 days	[56]
7	Evander Holyfield	WBA	March 3, 2001	38 years, 4 months, 12 days	[14]
8	Corrie Sanders	WBO	February 1, 2004	38 years, 25 days	[57]
9	Muhammad Ali	WBA	October 18, 1979	37 years, 9 months, 1 day
10	Jess Willard	Lineal	July 4, 1919	37 years, 6 months, 5 days

Championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes title reigns during which the champion captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

	Name	Recognition	Last day as champion	Age	Source(s)
1	Wladimir Klitschko	WBA, IBF, WBO	November 28, 2015	39 years, 8 months, 3 days	[4]
2	Jersey Joe Walcott	NBA, NYSAC	September 23, 1952	38 years, 7 months, 23 days	[44]
3	Lennox Lewis	WBC	February 6, 2004	38 years, 5 months, 4 days	[56]
4	Muhammad Ali	WBA	October 18, 1979	37 years, 9 months, 1 day
5	Jess Willard	Lineal	July 4, 1919	37 years, 6 months, 5 days	[33]
6	Jack Johnson	Lineal	April 5, 1915	37 years, 0 months, 5 days	[19]
7	Bob Fitzsimmons	Lineal	July 4, 1919	36 years, 0 months, 14 days	[40]
8	Larry Holmes	IBF	September 21, 1985	35 years, 10 months, 18 days	[8]
9	Joe Louis	NYSAC, NBA	March 1, 1949	34 years, 9 months, 16 days	[5]
10	Sonny Liston	NYSAC, WBA	July 22, 1963	34 years, 0 months, 24 days	[46]

Youngest champions

As of August 10, 2020.

All championship reigns

	Name	Recognition	Date	Age	Source(s)
1	Mike Tyson	WBC	November 22, 1986	20 years, 4 months, 23 days	[11]
2	Floyd Patterson	NBA, NYSAC	November 30, 1956	21 years, 10 months, 26 days	[18]
3	Muhammad Ali	WBA, WBC	February 25, 1964	22 years, 8 days	[7]
4	Joe Louis	NBA, NYSAC	June 22, 1937	23 years, 1 month, 9 days	[5]
5	Jack Dempsey	Lineal	July 4, 1919	24 years, 0 months, 10 days	[20]
6	George Foreman	WBA, WBC	February 22, 1973	24 years, 0 months, 12 days	[29]
7	Joe Frazier	NYSAC	March 4, 1968	24 years, 1 month, 21 days	[13]
8	James J. Jeffries	Lineal	June 9, 1899	24 years, 1 month, 25 days	[21]
9	Michael Dokes	WBA	December 10, 1982	24 years, 4 months	[58]
10	Wladimir Klitschko	WBO	October 14, 2000	24 years, 6 months, 19 days	[4]

Championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes title reigns during which the champion captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

	Name	Recognition	Date	Age	Source(s)
1	Mike Tyson	WBC	November 22, 1986	20 years, 4 months, 23 days	[11]
2	Floyd Patterson	NBA, NYSAC	November 30, 1956	21 years, 10 months, 26 days	[18]
3	Muhammad Ali	WBA, WBC	February 25, 1964	22 years, 8 days	[7]
4	Joe Louis	NBA, NYSAC	June 22, 1937	23 years, 1 month, 9 days	[5]
5	Jack Dempsey	Lineal	July 4, 1919	24 years, 0 months, 10 days	[20]
6	George Foreman	WBA, WBC	February 22, 1973	24 years, 0 months, 12 days	[29]
7	Joe Frazier	NYSAC	March 4, 1968	24 years, 1 month, 21 days	[13]
8	James J. Jeffries	Lineal	June 9, 1899	24 years, 1 month, 25 days	[21]
9	Leon Spinks	WBA	February 15, 1978	24 years, 7 months, 4 days	[47]
10	Tommy Burns	Lineal	January 16, 1902	24 years, 8 months, 6 days	[12]

Fastest world championship wins

By time elapsed from professional debut

Ranked by the time elapsed between professional debut and world heavyweight title win.

Note: WBO heavyweight title bouts before August 1997 are not included[3]

All championship reigns

	Name	Professional debut	World title win	Time elapsed	Fights
1	Leon Spinks	January 15, 1977	February 15, 1978	1 year, 1 month	[47]
2	Mike Tyson	March 6, 1985	November 22, 1986	1 year, 8 months, 16 days	[11]
3	John Tate	May 7, 1977	October 20, 1979	2 years, 5 months, 13 days	[59]
4	Anthony Joshua	October 5, 2013	April 9, 2016	2 years, 6 months, 4 days	[17]
5	Joe Frazier	August 16, 1965	March 4, 1968	2 years, 6 months, 17 days	[39]
6	Vitali Klitschko	November 16, 1996	June 26, 1999	2 years, 7 months, 10 days	[10]
7	Joe Louis	July 7, 1934	June 22, 1937	2 years, 11 months, 15 days	[29]
8	Charles Martin	October 27, 2012	January 16, 2016	3 years, 2 months, 20 days	[60]
9	Muhammad Ali	October 29, 1960	January 25, 1964	3 years, 2 months, 27 days	[7]
10	George Foreman	June 23, 1969	January 22, 1973	3 years, 6 months, 30 days	[29]

Championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes title reigns during which the champion captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

	Name	Professional debut	World title win	Time elapsed	Fights
1	Leon Spinks	January 15, 1977	February 15, 1978	1 year, 1 month	[47]
2	Mike Tyson	March 6, 1985	November 22, 1986	1 year, 8 months, 16 days	[11]
3	Joe Frazier	August 16, 1965	March 4, 1968	2 years, 6 months, 17 days	[13]
4	Joe Louis	July 7, 1934	June 22, 1937	2 years, 11 months, 15 days	[5]
5	Muhammad Ali	October 29, 1960	January 25, 1964	3 years, 2 months, 27 days	[7]
6	George Foreman	June 23, 1969	January 22, 1973	3 years, 6 months, 30 days	[29]
7	James J. Jeffries	October 29, 1895	June 9, 1899	3 years, 7 months, 11 days	[21]
8	Riddick Bowe	March 6, 1989	November 13, 1992	3 years, 6 months, 30 days	[31]
9	Tommy Burns	January 16, 1902	February 23, 1906	4 years, 1 month, 7 days	[12]
10	Jess Willard	February 5, 1911	April 5, 1915	4 years, 2 months	[33]

By number of bouts fought to win the world championship

Ranked by the number of bouts a boxer fought at the professional level before winning the world heavyweight title.

Note: WBO heavyweight title bouts before August 1997 are not included[3]

All championship reigns

	Name	Professional debut	World title win	Fights	Source(s)
1	Leon Spinks	January 15, 1977	February 15, 1978	8	[47]
2	James J. Corbett	March 6, 1985	November 22, 1986	11	[32]
3	James J. Jeffries	October 29, 1895	June 9, 1899	13	[21]
4	Anthony Joshua	October 5, 2013	April 9, 2016	16	[17]
5	Tim Witherspoon	August 16, 1965	March 4, 1968	19	[27]
6	John Tate	May 7, 1977	October 20, 1979	20	[59]
6	Joe Frazier	August 16, 1965	March 4, 1968	20	[13]
6	Muhammad Ali	October 29, 1960	January 25, 1964	20	[7]
8	Tony Tubbs	June 14, 1980	April 29, 1985	21	[61]
9	Lennox Lewis	January 27, 1989	December 14, 1992	22	[9]
9	Joseph Parker	July 5, 2012	December 10, 2016	22	[62]
9	Sultan Ibragimov	May 25, 2002	June 2, 2007	22	[63]
9	Ingemar Johansson	December 5, 1952	June 26, 1959	22	[45]

Championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes title reigns during which the champion captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

	Name	Professional debut	World title win	Fights	Source(s)
1	Leon Spinks	January 15, 1977	February 15, 1978	8	[47]
2	James J. Corbett	March 6, 1985	November 22, 1986	11	[32]
3	James J. Jeffries	October 29, 1895	June 9, 1899	13	[21]
4	Joe Frazier	August 16, 1965	March 4, 1968	20	[13]
4	Muhammad Ali	October 29, 1960	January 25, 1964	20	[7]
6	Ingemar Johansson	December 5, 1952	June 26, 1959	22	[45]
7	Evander Holyfield	November 15, 1984	October 25, 1990	25	[14]
7	Tyson Fury	December 6, 2008	November 28, 2015	25	[36]
9	Mike Tyson	March 6, 1985	November 22, 1986	28	[11]
9	Larry Holmes	March 21, 1973	June 9, 1978	28	[8]
9	Michael Spinks	April 16, 1977	September 21, 1985	28	[38]
9	Jess Willard	February 5, 1911	April 5, 1915	28	[33]

Statistics by era

Before 1921

At the very beginnings, before the establishment of the sanctioning organizations, the title recognition passed through lineage in the fights under Marquess of Queensberry Rules. The champion was informally called "the man who beat the man". The fight between John L. Sullivan and Dominick McCaffrey is recognized by many boxing historians, including those at The Ring, to be for the inaugural World Heavyweight Championship under the Marquess of Queensberry Rules (however, some dispute that claim for various reasons, including the short distance of the bout, McCaffrey's small size and the fact that both fighters were Americans).[64] The lineage was the only universally recognized form of a world championship until July 2, 1921, when Jack Dempsey became the inaugural NBA Heavyweight Champion.

Name	Reign began-ended	Title recognition	Title bout wins	Beaten opponents	Fights
Tommy Burns	February 23, 1906 – December 26, 1908	lineal	13	11	[12]
James J. Jeffries	June 9, 1899 – May 13, 1905	lineal	8	6	[21]
Jack Johnson	December 26, 1908 – April 5, 1915	lineal	6	6	[19]
Jack Dempsey	July 4, 1919 – July 2, 1921	lineal	3	3	[20]
James J. Corbett	September 7, 1892 – March 17, 1897	lineal	2	2	[32]
Jess Willard	April 5, 1915 – July 4, 1919				[33]

National sanctioning bodies

The growing popularity of boxing led to a birth of various regional sanctioning organizations, with each recognizing their own champion. The major governing bodies were the National Boxing Association, formed in 1921, the New York State Athletic Commission, found after the Walker Law legalized prizefighting in New York in 1920, and the International Boxing Union, created in 1911 in Paris in an attempt create a unified international governing body for professional boxing. The NBA and NYSAC both made then-lineal champion Jack Dempsey their inaugural champion on July 2, 1921, and July 24, 1922, respectively.[65]

Name	Reign began-ended	Title recognition	Title bout wins	Beaten opponents	Fights
Joe Louis	June 22, 1937 – March 1, 1949	NYSAC, NBA	27	22	[5]
Jack Dempsey	July 2, 1921 – September 23, 1926	NYSAC, NBA	3	3	[20]
Primo Carnera	June 29, 1933 – June 14, 1934	NYSAC, NBA, IBU			[30]
Gene Tunney	September 23, 1926 – July 31, 1928	NYSAC, NBA		2	[37]
Max Schmeling	June 12, 1930 – June 21, 1932	NYSAC, NBA, IBU	2	2	[34]
Jack Sharkey	June 21, 1932 – June 29, 1933	NYSAC, NBA, IBU	1	1	[66]
Max Baer	June 14, 1934 – June 13, 1935	NYSAC, NBA, IBU			[42]
James J. Braddock	June 13, 1935 – June 22, 1937	NYSAC, NBA, IBU			[43]

International expansion

First international expansion

The growing popularity of boxing outside of the USA led to creation of various boxing organizations, each strengthening their influence (most notably the British Boxing Board of Control (BBBofC)) and having their own champion. This resulted in a growing number of boxers claiming to be legitimate champions. The disruption in boxing was solved after the World War II when the World Championship Committee (WCC) was created with NBA as its unanimous authority. The committee, however, was disbanded in 1955 when NBA, along with its new members (which included the Orient, Mexican and South American federations and boxing commissions of the Philippines and Thailand) left WCC citing lack of control over the organisation. The NBA's voting scheme guaranteed one vote for each state commission as well as one vote for each foreign country.[67][68] On August 23, 1962, the NBA officially became the WBA and moved their headquarters to Panama City, Panama.

Name	Reign began-ended	Title recognition	Title bout wins	Beaten opponents	Fights
Ezzard Charles	June 22, 1949 – July 18, 1951	NBA, NYSAC	9	8	[15]
Floyd Patterson	1. November 30, 1956 – June 26, 1959 2. June 20, 1960 – September 25, 1962	NBA, NYSAC	8	7	[18]
Rocky Marciano	September 23, 1952 – April 27, 1956	NBA, NYSAC	7	5	[28]
Jersey Joe Walcott	July 18, 1951 – September 23, 1952	NYSAC, NBA	2	1	[44]
Ingemar Johansson	June 26, 1959 — June 20, 1960	NBA, NYSAC	1	1	[45]
Sonny Liston	September 25, 1962 – September 25, 1962	NBA, NYSAC	1	1	[46]

Second international expansion

A year later NYSAC along with European Boxing Union (EBU) and BBBofC supported creation of the WBC. WBC was officially established on February 14, 1963, in Mexico City, Mexico by 11 countries (the United States, Puerto Rico, Argentina, United Kingdom, France, Mexico, Philippines, Panama, Chile, Peru, Venezuela and Brazil) that were invited by the President of Mexico Adolfo López Mateos to form an international organization to unify all commissions of the world to control the expansion of boxing.[69] The reason for the move were concerns about WBA's alleged lack of desire to support professional boxing outside of the USA.[70] In April 1983, members of United States Boxing Association (USBA) along with Robert W. Lee (a former WBA vice-president) voted to expand the organisation and form the USBA-International. The organization later changed the name to IBF.[71] The inaugural IBF heavyweight champion was Larry Holmes, who relinquished the WBC title to accept IBF's recognition, thus helping the newly formed organization to establish its legitimacy. Another major sanctioning body, the WBO, was established in 1988 in San Juan, Puerto Rico by a group of local businessmen. At the beginnings, when most of the challengers for WBA, WBC and IBF titles were Americans, WBO had a wider variety of countries, mainly European, represented in title bouts. In the inaugural bout, Italian boxer Francesco Damiani defeated Johnny du Plooy from South Africa by KO in the 3rd round. Before the Klitschko Era, United Kingdom tied USA for most wins in WBO heavyweight title fights with 8.[72] WBO struggled with receiving credibility at first, but by the beginning of the 2000s, the WBA was giving the same recognition to WBO champions as it did to WBC and IBF champions.

WBA, WBC, IBF, and WBO are all recognized as major boxing organizations by each other and the International Boxing Hall of Fame. Riddick Bowe and Tyson Fury are the only heavyweight boxers to win all four world titles (though neither held all four simultaneously), while Vitali and Wladimir Klitschko are the only brothers to hold them at the same time (from 2011 to 2013). Wladimir is the only unified champion to successfully defend the title against the same opponent twice (Tony Thompson in 2008 and 2012).

Keys:

     Active title reign

     Reign has ended

Note 1: WBA (Regular) champions are not included

Note 2: The list of most consecutive defenses includes all title reigns of each boxer

Note 3: WBO heavyweight title bouts before August 1997 are not included[3]

Most opponents beaten in title fights

All championship reigns

Pos.	Name	Reign began-ended	Recognition	Beaten opponents	Fights
1.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. WBA, IBF, WBO	23	[4]
2.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. WBA, WBC 2. WBA, WBC 3. WBA	21	[7]
3.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	20	[8]
4.	Lennox Lewis	1. December 14, 1992 — September 24, 1994 2. February 7, 1997 — April 22, 2001 3. November 17, 2001 — February 6, 2004	1. WBC 2. WBA, WBC, IBF 3. WBC, IBF	15	[9]
4.	Vitali Klitschko	1. June 26, 1999 — April 1, 2000 2. April 24, 2004 — November 9, 2005 3. October 11, 2008 — December 15, 2013	1. WBO 2. WBC 3. WBC	15	[10]
6.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. WBA, WBC, IBF 2. WBA, WBC	11	[11]
7.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	10	[13]
8.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999 4. August 12, 2000 — March 3, 2001	1. WBA, WBC, IBF 2. WBA, IBF 3. WBA, IBF 4. WBA	9	[14]
8.	Deontay Wilder	January 17, 2015 — February 22, 2020	WBC	8	[16]
8.	Anthony Joshua	1. April 9, 2016 — June 1, 2019 2. December 7, 2019 — present	WBA, IBF, WBO	8	[17]
11.	Nikolai Valuev	1. December 17, 2005 – April 14, 2007 2. August 30, 2008 – November 7, 2009	WBA	5	[73]
11.	Chris Byrd	1. April 1, 2000 – October 14, 2000 2. December 14, 2002 – April 22, 2006	1. WBO 2. IBF	5	[25]
11.	George Foreman	1. January 22, 1973 — October 30, 1974 2. November 4, 1994 — June 29, 1995	1. WBA, WBC 2. WBA, IBF	5	[29]
14.	John Ruiz	1. March 3, 2001 – March 1, 2003 2. February 20, 2004 – December 17, 2005	WBA	4	[74]
14.	Michael Moorer	1. April 22, 1994 – November 5, 1994 2. June 22, 1996 – November 8, 1997	1. WBA, IBF 2. IBF		[75]
14.	Lamon Brewster	April 10, 2004 – April 1, 2006	WBO		[51]

All championship reigns of undisputed champions/The Ring champions

The list does not include The Ring championship fights, although it only includes heavyweight champions that captured undisputed championship (1962–present) or The Ring championship (1962–1989, 2002–).

Pos.	Name	Reign began-ended	Recognition	Beaten opponents	Fights
1.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. WBA, IBF, WBO	23	[4]
2.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. WBA, WBC 2. WBA, WBC 3. WBA	21	[7]
3.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	20	[8]
4.	Lennox Lewis	1. December 14, 1992 — September 24, 1994 2. February 7, 1997 — April 22, 2001 3. November 17, 2001 — February 6, 2004	1. WBC 2. WBA, WBC, IBF 3. WBC, IBF	15	[9]
4.	Vitali Klitschko	1. June 26, 1999 — April 1, 2000 2. April 24, 2004 — November 9, 2005 3. October 11, 2008 — December 15, 2013	1. WBO 2. WBC 3. WBC	15	[10]
6.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. WBA, WBC, IBF 2. WBA, WBC	11	[11]
7.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	10	[13]
8.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999 4. August 12, 2000 — March 3, 2001	1. WBA, WBC, IBF 2. WBA, IBF 3. WBA, IBF 4. WBA	9	[14]
10.	George Foreman	1. January 22, 1973 — October 30, 1974 2. November 4, 1994 — June 29, 1995	1. WBA, WBC 2. WBA, IBF	5	[29]
11.	Riddick Bowe	November 13, 1992 — November 6, 1993	WBA, WBC, IBF	3	[31]
12.	Tyson Fury	1. November 28, 2015 — October 12, 2016 2. February 22, 2020 — present	1. WBA, WBO, IBF 2. WBC	2	[36]
12.	Michael Spinks	September 21, 1985 — February 19, 1987	IBF	2	[38]
14.	Sonny Liston	September 25, 1962 — February 25, 1964	WBA, WBC	1	[46]
14.	Leon Spinks	February 15, 1978 — September 15, 1978	WBA, WBC	1	[47]
14.	Buster Douglas	February 11, 1990 — October 25, 1990	WBA, WBC, IBF	1	[48]

Championship reigns of undisputed champions/The Ring champions with successful unifications/victories over champions

The list does not include The Ring championship fights, although it only includes heavyweight champions that captured undisputed championship (1962–present) or The Ring championship (1962–1989, 2002–).

The list only includes title reigns during which the champion:

• has won undisputed championship (1962–present), The Ring championship (1962–1989, 2002–)
• unified[22][23][24] the titles
• defeated a fighter that either had to drop his own world title prior to the fight due to organization's championship policy or would later become the world champion whilst the winner's reign was still active

As of August 10, 2020.

Pos.	Name	Reign began-ended	Recognition	Additional recognition	Beaten champions (recognition)	Beaten opponents	Fights
1.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. unified	2. The Ring	1. Chris Byrd (IBF)	23	[4][25]
2.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. undisputed 2. undisputed 3. WBA	The Ring		21	[7]
3.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC-to-IBF	The Ring	Mike Weaver (WBA), Tim Witherspoon (WBC)	20	[8][26]
4.	Lennox Lewis	1. February 7, 1997 — April 22, 2001 2. November 17, 2001 — February 6, 2004	1. undisputed 2. unified	2. The Ring	1. Evander Holyfield (WBA)	12	[9][14]
5.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. undisputed 2. unified	1. The Ring		11	[11]
6.	Joe Frazier	March 4, 1968 — January 22, 1973	undisputed	The Ring		10	[13]
7.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999	1. undisputed 2. unified 3. unified			8	[14]
8.	George Foreman	1. January 22, 1973 — October 30, 1974 2. November 4, 1994 — June 29, 1995	1. undisputed 2. unified	1. The Ring		5	[29]
9.	Riddick Bowe	November 13, 1992 — November 6, 1993	undisputed			3	[31]
10.	Vitali Klitschko	April 24, 2004 — November 9, 2005	WBC	The Ring	Corrie Sanders (WBO)	2	[10][35]
10.	Tyson Fury	1. November 28, 2015 — October 12, 2016 2. February 22, 2020 — present	1. unified 2. WBC	1. The Ring 2. The Ring		2	[36]
10.	Michael Spinks	September 21, 1985 — February 19, 1987	IBF	The Ring		2	[38]
13.	Sonny Liston	September 25, 1962 — February 25, 1964	undisputed	The Ring		1	[46]
13.	Leon Spinks	February 15, 1978 — September 15, 1978	undisputed	The Ring		1	[47]
13.	Buster Douglas	February 11, 1990 — October 25, 1990	undisputed			1	[48]

Most wins in title fights

All championship reigns

Pos.	Name	Reign began-ended	Recognition	Title fight wins	Fights
1.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. WBA, IBF, WBO	25	[4]
2.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. WBA, WBC 2. WBA, WBC 3. WBA	22	[7]
3.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	20	[8]
4.	Lennox Lewis	1. December 14, 1992 — September 24, 1994 2. February 7, 1997 — April 22, 2001 3. November 17, 2001 — February 6, 2004	1. WBC 2. WBA, WBC, IBF 3. WBC, IBF	15	[9]
4.	Vitali Klitschko	1. June 26, 1999 — April 1, 2000 2. April 24, 2004 — November 9, 2005 3. October 11, 2008 — December 15, 2013	1. WBO 2. WBC 3. WBC	15	[10]
6.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. WBA, WBC, IBF 2. WBA, WBC	12	[11]
7.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	10	[13]
7.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999 4. August 12, 2000 — March 3, 2001	1. WBA, WBC, IBF 2. WBA, IBF 3. WBA, IBF 4. WBA	10	[14]
7.	Deontay Wilder	January 17, 2015 — February 22, 2020	WBC	10	[16]
10.	Anthony Joshua	1. April 9, 2016 — June 1, 2019 2. December 7, 2019 — present	WBA, IBF, WBO	8	[17]
11.	Nikolai Valuev	1. December 17, 2005 – April 14, 2007 2. August 30, 2008 – November 7, 2009	WBA	6	[73]
12.	Chris Byrd	1. April 1, 2000 – October 14, 2000 2. December 14, 2002 – April 22, 2006	1. WBO 2. IBF	5	[25]
12.	George Foreman	1. January 22, 1973 — October 30, 1974 2. November 4, 1994 — June 29, 1995	1. WBA, WBC 2. WBA, IBF	5	[29]
14.	John Ruiz	1. March 3, 2001 – March 1, 2003 2. February 20, 2004 – December 17, 2005	WBA	4	[74]
14.	Michael Moorer	1. April 22, 1994 – November 5, 1994 2. June 22, 1996 – November 8, 1997	1. WBA, IBF 2. IBF		[75]
14.	Lamon Brewster	April 10, 2004 – April 1, 2006	WBO		[51]

All championship reigns of undisputed champions/The Ring champions

The list does not include The Ring championship fights, although it only includes heavyweight champions that captured undisputed championship (1962–present) or The Ring championship (1962–1989, 2002–).

Pos.	Name	Reign began-ended	Recognition	Title fight wins	Fights
1.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. WBA, IBF, WBO	25	[4]
2.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. WBA, WBC 2. WBA, WBC 3. WBA	22	[7]
3.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC, IBF	20	[8]
4.	Lennox Lewis	1. December 14, 1992 — September 24, 1994 2. February 7, 1997 — April 22, 2001 3. November 17, 2001 — February 6, 2004	1. WBC 2. WBA, WBC, IBF 3. WBC, IBF	15	[9]
4.	Vitali Klitschko	1. June 26, 1999 — April 1, 2000 2. April 24, 2004 — November 9, 2005 3. October 11, 2008 — December 15, 2013	1. WBO 2. WBC 3. WBC	15	[10]
6.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. WBA, WBC, IBF 2. WBC, WBA	12	[11]
7.	Joe Frazier	March 4, 1968 — January 22, 1973	NYSAC, WBA, WBC	10	[13]
7.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999 4. August 12, 2000 — March 3, 2001	1. WBA, WBC, IBF 2. WBA, IBF 3. WBA, IBF 4. WBA	10	[14]
9.	George Foreman	1. January 22, 1973 — October 30, 1974 2. November 4, 1994 — June 29, 1995	1. WBA, WBC 2. WBA, IBF	5	[29]
10.	Riddick Bowe	November 13, 1992 — November 6, 1993	WBA, WBC, IBF	3	[31]
10.	Michael Spinks	September 21, 1985 — February 19, 1987	IBF	3	[38]
12.	Tyson Fury	1. November 28, 2015 — October 12, 2016 2. February 22, 2020 — present	1. WBA, WBO, IBF 2. WBC	2	[36]
12.	Sonny Liston	September 25, 1962 — February 25, 1964	WBA, WBC	2	[46]
14.	Leon Spinks	February 15, 1978 — September 15, 1978	WBA, WBC	1	[47]
14.	Buster Douglas	February 11, 1990 — October 25, 1990	WBA, WBC, IBF	1	[48]

Championship reigns of undisputed champions/The Ring champions with successful unifications/victories over champions

The list does not include The Ring championship fights, although it only includes heavyweight champions that captured undisputed championship (1962–present) or The Ring championship (1962–1989, 2002–).

The list only includes title reigns during which the champion:

• has won undisputed championship (1962–present), The Ring championship (1962–1989, 2002–)
• unified[22][23][24] the titles
• defeated a fighter that either had to drop his own world title prior to the fight due to organization's championship policy or would later become the world champion whilst the winner's reign was still active

As of August 10, 2020.

Pos.	Name	Reign began-ended	Recognition	Additional recognition	Beaten champions (recognition)	Title fight wins	Fights
1.	Wladimir Klitschko	1. October 14, 2000 — March 8, 2003 2. April 22, 2006 — November 28, 2015	1. WBO 2. unified	2. The Ring	1. Chris Byrd (IBF)	25	[4][25]
2.	Muhammad Ali	1. February 25, 1964 – March 11, 1969 2. October 30, 1974 — February 15, 1978 3. September 15, 1978 — October 18, 1979	1. undisputed 2. undisputed 3. WBA	1. The Ring 2. The Ring 3. The Ring		22	[7]
3.	Larry Holmes	June 9, 1978 — September 21, 1985	WBC-to-IBF	The Ring	Mike Weaver (WBA), Tim Witherspoon (WBC)	20	[8][26][27]
4.	Lennox Lewis	1. February 7, 1997 — April 22, 2001 2. November 17, 2001 — February 6, 2004	1. undisputed 2. unified	2. The Ring	1. Evander Holyfield (WBA)	12	[9][14]
4.	Mike Tyson	1. November 22, 1986 — February 11, 1990 2. March 16, 1996 — November 9, 1996	1. undisputed 2. unified	1. The Ring		12	[11]
6.	Joe Frazier	March 4, 1968 — January 22, 1973	unified	The Ring		10	[13]
7.	Evander Holyfield	1. October 25, 1990 — November 13, 1992 2. November 6, 1993 — April 22, 1994 3. November 9, 1996 — November 13, 1999	1. undisputed 2. unified 3. unified			9	[14]
8.	George Foreman	1. January 22, 1973 — October 30, 1974 2. November 4, 1994 — June 29, 1995	1. undisputed 2. unified	1. The Ring		5	[29]
9.	Riddick Bowe	November 13, 1992 — November 6, 1993	undisputed			3	[31]
9.	Michael Spinks	September 21, 1985 — February 19, 1987	IBF	The Ring		3	[38]
11.	Vitali Klitschko	April 24, 2004 — November 9, 2005	WBC	The Ring	Corrie Sanders (WBO)	2	[10][35]
11.	Tyson Fury	1. November 28, 2015 — October 12, 2016 2. February 22, 2020 — present	1. unified 2. WBC	1. The Ring 2. The Ring		2	[36]
11.	Sonny Liston	September 25, 1962 — February 25, 1964	undisputed	The Ring		2	[46]
14.	Leon Spinks	February 15, 1978 — September 15, 1978	undisputed	The Ring		1	[47]
14.	Buster Douglas	February 11, 1990 — October 25, 1990	undisputed			1	[48]

Most opponents beaten during one title reign

All championship reigns

Pos.	Name	Reign began-ended	Order of title reign	Title recognition	Beaten opponents	Fights
1.	Larry Holmes	June 9, 1978 — September 21, 1985	1st	WBC-to-IBF	19	[8]
2.	Wladimir Klitschko	April 22, 2006 — November 28, 2015	2nd	WBA, WBO, IBF	17	[4]
3.	Muhammad Ali	October 30, 1974 — February 15, 1978	2nd	WBA, WBC	10	[7]
4.	Mike Tyson	November 22, 1986 — February 11, 1990	1st	WBA, WBC, IBF	9	[11]
4.	Muhammad Ali	February 25, 1964 – March 11, 1969	1st	WBA, WBC		[7]
4.	Joe Frazier	March 4, 1968 — January 22, 1973	1st	NYSAC, WBA, WBC		[13]
4.	Vitali Klitschko	October 11, 2008 — December 15, 2013	3rd	WBC		[10]
4.	Deontay Wilder	January 17, 2015 — February 22, 2020	1st	WBC		[16]
9.	Lennox Lewis	February 7, 1997 — April 22, 2001	2nd	WBA, WBC, IBF	8	[9]
10.	Anthony Joshua	April 9, 2016 – June 1, 2019	1st	WBA, WBO, IBF	6	[17]
11.	Wladimir Klitschko	October 14, 2000 — March 8, 2003	1st	WBO	5	[4]
12.	Evander Holyfield	November 6, 1993 — April 22, 1994	2nd	WBA, IBF	4	[14]
12.	Chris Byrd	December 14, 2002 – April 22, 2006	2nd	IBF		[25]
14.	Evander Holyfield	October 25, 1990 — November 13, 1992	1st	WBA, WBC, IBF	3	[14]
14.	Nikolai Valuev	December 17, 2005 – April 14, 2007	1st	WBA		[73]
14.	John Ruiz	February 20, 2004 – December 17, 2005	2nd	WBA		[74]
14.	Lennox Lewis	December 14, 1992 – September 24, 1994	1st	WBC		[9]
14.	Lamon Brewster	April 10, 2004 – April 1, 2006	1st	WBO		[51]

Championship reigns of undisputed champions/The Ring champions

The list does not include The Ring championship fights, although it only includes title reigns during which the champion captured undisputed championship (1962–present) or The Ring championship (1962–1989, 2002–). For the purpose of this list, successful title defenses that ended in a draw are also included.

Pos.	Name	Order of title reign	Reign began-ended	Recognition	Beaten opponents	Fights
1.	Larry Holmes	June 9, 1978 — September 21, 1985	1st	WBC-to-IBF	19	[8]
2.	Wladimir Klitschko	April 22, 2006 — November 28, 2015	2nd	WBA, WBO, IBF	17	[4]
3.	Muhammad Ali	October 30, 1974 — February 15, 1978	2nd	WBA, WBC	10	[7]
4.	Mike Tyson	November 22, 1986 — February 11, 1990	1st	WBA, WBC, IBF	9	[11]
4.	Muhammad Ali	February 25, 1964 – March 11, 1969	1st	WBA, WBC		[7]
4.	Joe Frazier	March 4, 1968 — January 22, 1973	1st	NYSAC, WBA, WBC		[13]
7.	Lennox Lewis	February 7, 1997 — April 22, 2001	2nd	WBA, WBC, IBF	8	[9]
8.	Evander Holyfield	October 25, 1990 — November 13, 1992	1st	WBA, WBC, IBF	3	[14]

Most consecutive title defenses

All championship reigns

Pos.	Name	Reign began-ended	Order of title reign	Title recognition	Title defenses	Fights
1.	Larry Holmes	June 9, 1978 — September 21, 1985	1st	WBC-to-IBF	19	[8]
2.	Wladimir Klitschko	April 22, 2006 — November 28, 2015	2nd	WBA, WBO, IBF	18	[4]
3.	Muhammad Ali	October 30, 1974 — February 15, 1978	2nd	WBA, WBC	10	[7]
3.	Deontay Wilder	January 17, 2015 — February 22, 2020	1st	WBC		[16]
5.	Mike Tyson	November 22, 1986 — February 11, 1990	1st	WBA, WBC, IBF	9	[11]
5.	Muhammad Ali	February 25, 1964 – March 11, 1969	1st	WBA, WBC		[7]
5.	Joe Frazier	March 4, 1968 — January 22, 1973	1st	NYSAC, WBA, WBC		[13]
5.	Vitali Klitschko	October 11, 2008 — December 15, 2013	3rd	WBC		[10]
5.	Lennox Lewis	February 7, 1997 — April 22, 2001	2nd	WBA, WBC, IBF		[9]
10.	Anthony Joshua	April 9, 2016 – June 1, 2019	1st	WBA, WBO, IBF	6	[17]
11.	Wladimir Klitschko	October 14, 2000 — March 8, 2003	1st	WBO	5	[4]
12.	Evander Holyfield	November 6, 1993 — April 22, 1994	2nd	WBA, IBF	4	[14]
12.	Chris Byrd	December 14, 2002 – April 22, 2006	2nd	IBF		[25]
14.	Evander Holyfield	October 25, 1990 — November 13, 1992	1st	WBA, WBC, IBF	3	[14]
14.	Nikolai Valuev	December 17, 2005 – April 14, 2007	1st	WBA		[73]
14.	John Ruiz	February 20, 2004 – December 17, 2005	2nd	WBA		[74]
14.	Lennox Lewis	December 14, 1992 – September 24, 1994	1st	WBC		[9]
14.	Lamon Brewster	April 10, 2004 – April 1, 2006	1st	WBO		[51]

Championship reigns of undisputed champions/The Ring champions

The list does not include The Ring championship fights, although it only includes title reigns during which the champion captured undisputed championship (1962–present) or The Ring championship (1962–1989, 2002–). For the purpose of this list, successful title defenses that ended in a draw are also included.

Pos.	Name	Reign began-ended	Order of title reign	Title recognition	Title defenses	Fights
1.	Larry Holmes	June 9, 1978 — September 21, 1985	1st	WBC-to-IBF	19	[8]
2.	Wladimir Klitschko	April 22, 2006 — November 28, 2015	2nd	WBA, WBO, IBF	18	[4]
3.	Muhammad Ali	October 30, 1974 — February 15, 1978	2nd	WBA, WBC	10	[7]
4.	Mike Tyson	November 22, 1986 — February 11, 1990	1st	WBA, WBC, IBF	9	[11]
4.	Muhammad Ali	February 25, 1964 – March 11, 1969	1st	WBA, WBC		[7]
4.	Joe Frazier	March 4, 1968 — January 22, 1973	1st	NYSAC, WBA, WBC		[13]
4.	Lennox Lewis	February 7, 1997 — April 22, 2001	2nd	WBA, WBC, IBF		[9]
8.	Evander Holyfield	October 25, 1990 — November 13, 1992	1st	WBA, WBC, IBF	3	[14]

Most wins in unified title fights

Name	Title recognition	Title fight wins
Wladimir Klitschko	WBA, WBO, IBF	15
Muhammad Ali	WBA, WBC	14
Mike Tyson	WBA, WBC, IBF	9
Evander Holyfield	WBA, WBC, IBF	7
Lennox Lewis	WBA, WBC, IBF	6
Joe Frazier	WBA, WBC	5
Anthony Joshua	WBA, WBO, IBF	5
George Foreman	WBA, WBC, IBF	4
Riddick Bowe	WBA, WBC, IBF	2
Tyson Fury	WBA, WBO, IBF	1
Buster Douglas	WBA, WBC, IBF
Andy Ruiz Jr.	WBA, WBO, IBF
Michael Moorer	WBA, IBF
Sonny Liston	WBA, WBC
Leon Spinks	WBA, WBC
Hasim Rahman	WBC, IBF

Most consecutive unified title defenses

Name	Order of title reign	Title recognition	Title defenses
Wladimir Klitschko	1st	WBA, WBO, IBF	13
Muhammad Ali	3rd	WBA, WBC	10
Mike Tyson	1st	WBA, WBC, IBF	8
Joe Frazier	1st	WBA, WBC	4
Evander Holyfield	1st	WBA, WBC, IBF	3
Lennox Lewis	1st	WBA, WBC, IBF
Anthony Joshua	1st	WBA, WBO, IBF
Evander Holyfield	3rd	WBA, IBF	2
George Foreman	1st	WBA, WBC
Riddick Bowe	1st	WBA, WBC, IBF	1
Lennox Lewis	2nd	WBC, IBF
Muhammad Ali	2nd	WBA, WBC
Sonny Liston	1st	WBA, WBC

Statistics by non-US country

The list includes world heavyweight boxing champions from outside of the United States. It includes only major titles, without The Ring and lineal championships (after 1921).

Note 1: WBA (Regular) champions are not included

Note 2: WBO heavyweight title bouts before August 1997 are not included[3]

Title fight wins & beaten opponents

All championship reigns

Country	No. of champions	Boxers by Name	Title wins	Beaten opponents	Fights
Ukraine	2	Vitali Klitschko, Wladimir Klitschko	40	37	[10][4]
United Kingdom	6	Bob Fitzsimmons, Lennox Lewis*, Frank Bruno, Herbie Hide, David Haye, Tyson Fury, Anthony Joshua	33	30	[40][9][76][50][77][36][17]
Canada	4	Tommy Burns, Trevor Berbick*, Bermane Stiverne, Lennox Lewis*	30	28	[12][78][79][9]
Russia	3	Nikolai Valuev, Oleg Maskaev, Sultan Ibragimov	9	7	[73][55][63]
Italy	1	Primo Carnera	3	3	[30]
Uzbekistan	1	Ruslan Chagaev	3	3	[80]
New Zealand	1	Joseph Parker	3	3	[62]
South Africa	2	Gerrie Coetzee, Corrie Sanders	2	2	[81][82]
Germany	1	Max Schmeling	2	2	[34]
Sweden	1	Ingemar Johansson	1	1	[45]
Belarus	1	Siarhei Liakhovich	1	1	[83]
Nigeria	1	Samuel Peter	1	1	[84]
Mexico	1	Andy Ruiz Jr.	1	1	[85]
Jamaica	1	Trevor Berbick*	1	1	[78]

All championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes heavyweight champions that captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–).

Country	No. of champions	Boxers by Name	Title wins	Beaten opponents	Fights
Ukraine	2	Vitali Klitschko, Wladimir Klitschko	40	37	[10][4]
Canada	2	Tommy Burns, Lennox Lewis*	28	26	[12][9]
United Kingdom	3	Bob Fitzsimmons, Lennox Lewis*, Tyson Fury	18	18	[40][9][36]
Italy	1	Primo Carnera	3	3	[30]
Germany	1	Max Schmeling	2	2	[34]
Sweden	1	Ingemar Johansson	1	1	[45]

Championship reigns of undisputed champions/lineal champions/The Ring champions with successful unifications/victories over champions

The list only includes title reigns during which the champion:

• has won undisputed championship (1922–present), The Ring championship (1922–1989, 2002–), lineal championship (1885–1921)
• unified[22][23][24] the titles
• defeated a fighter that either had to drop his own world title prior to the fight due to organization's championship policy or would later become the world champion whilst the winner's reign was still active

Country	No. of champions	Boxers by Name	Title wins	Beaten opponents	Fights
Ukraine	2	Vitali Klitschko, Wladimir Klitschko	27	25	[10][4][25]
Canada	2	Tommy Burns, Lennox Lewis*	25	23	[12][9][14]
United Kingdom	3	Bob Fitzsimmons, Lennox Lewis*, Tyson Fury	15	15	[40][9][14][36]
Italy	1	Primo Carnera	3	3	[30]
Germany	1	Max Schmeling	2	2	[34]
Sweden	1	Ingemar Johansson	1	1	[45]

Title streaks

Only major titles, without The Ring and lineal championships (after 1921), are included.

All championship reigns

For the purpose of this list, successful title defenses that ended in a draw are also included.

Country	Champion	Title defenses	Beaten opponents	Fights
Ukraine	Wladimir Klitschko	18	17	[4]
Canada	Tommy Burns	13	11	[12]
United Kingdom	Lennox Lewis	9	8	[9]
Russia	Nikolai Valuev	6	5	[73]
Italy	Primo Carnera	2	2	[30]
Uzbekistan	Ruslan Chagaev	2	2	[80]
New Zealand	Joseph Parker	2	2	[62]
Germany	Max Schmeling	1	1	[34]

Championship reigns of undisputed champions/lineal champions/The Ring champions

The list does not include The Ring and lineal championship fights after 1921, although it only includes title reigns during which the champion captured undisputed championship (1922–present), lineal championship (1885–1921) or The Ring championship (1922–1989, 2002–). For the purpose of this list, successful title defenses that ended in a draw are also included.

Country	Champion	Title defenses	Beaten opponents	Fights
Ukraine	Wladimir Klitschko	18	17	[4]
Canada	Tommy Burns	13	11	[12]
United Kingdom	Lennox Lewis	9	8	[9]
Italy	Primo Carnera	2	2	[30]
Germany	Max Schmeling	1	1	[34]

See also

• List of world heavyweight boxing champions
• List of current world boxing champions
• List of WBA world champions
• List of WBC world champions
• List of IBF world champions
• List of WBO world champions
• List of The Ring world champions
• List of undefeated boxing world champions (retired only)
• List of undisputed world boxing champions

References

1. "The Boxing Register: International Boxing Hall Of Fame Official Record Book" (pdf). International Boxing Hall Of Fame. Retrieved May 26, 2019.
2. "The Ring updates championship policy". Ring TV. May 3, 2012.
3. James B. Roberts, Alexander G. Skutt: The Boxing Register: International Boxing Hall of Fame Official Record Book, p. 331–32. The record of Ricardo Lopez indicates his opponent Alex Sánchez as WBO "World Champion" on August 23, 1997, meanwhile Michael Carbajal's opponent Josue Camacho (fought on July 15, 1994) didn't receive the same recognition, thus suggesting that WBO title hadn't been viewed by IBHOF as a major title prior to (at least) August 1997, when Herbie Hide (won the title on June 28, 1997) was WBO heavyweight champion
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5. "Professional boxing record: Joe Louis". Retrieved March 14, 2020.
6. "Joe Louis, p. 575" (pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. Johnny Davis, Ret-World-H
7. "Professional boxing record: Muhammad Ali". Retrieved March 14, 2020.
8. "Professional boxing record: Larry Holmes". Retrieved March 15, 2020.
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11. "Professional boxing record: Mike Tyson". Retrieved March 18, 2020.
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15. "Professional boxing record: Ezzard Charles". Retrieved March 14, 2020.
16. "Professional boxing record: Deontay Wilder". Retrieved March 21, 2020.
17. "Professional boxing record: Anthony Joshua". Retrieved March 20, 2020.
18. "Professional boxing record: Floyd Patterson". Retrieved March 14, 2020.
19. "Professional boxing record: Jack Johnson". Retrieved March 14, 2020.
20. "Professional boxing record: Jack Dempsey". Retrieved March 14, 2020.
21. "Professional boxing record: James J. Jeffries". Retrieved March 14, 2020.
22. International Boxing Federation rules: governing championship contests
23. World Boxing Organization: regulation of world championship contests
24. World Boxing Association rules and regulations
25. "Professional boxing record: Chris Byrd". Retrieved March 19, 2020.
26. "Professional boxing record: Mike Weaver". Retrieved March 15, 2020.
27. "Professional boxing record: Tim Witherspoon". Retrieved March 15, 2020.
28. "Professional boxing record: Rocky Marciano". Retrieved March 14, 2020.
29. "Professional boxing record: George Foreman". Retrieved March 14, 2020.
30. "Professional boxing record: Primo Carnera". Retrieved March 14, 2020.
31. "Professional boxing record: Riddick Bowe". Retrieved March 19, 2020.
32. "Professional boxing record: James J. Corbett". Retrieved March 14, 2020.
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34. "Professional boxing record: Max Schmeling". Retrieved March 14, 2020.
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37. "Professional boxing record: Gene Tunney". Retrieved March 14, 2020.
38. "Professional boxing record: Michael Spinks". Retrieved March 18, 2020.
39. "Professional boxing record: John L. Sullivan". Retrieved March 14, 2020.
40. "Professional boxing record: Bob Fitzsimmons". Retrieved March 14, 2020.
41. "Professional boxing record: Marvin Hart". Retrieved March 14, 2020.
42. "Professional boxing record: Max Baer". Retrieved March 14, 2020.
43. "Professional boxing record: Jim Braddock". Retrieved March 14, 2020.
44. "Professional boxing record: Jersey Joe Walcott". Retrieved March 14, 2020.
45. "Professional boxing record: Ingemar Johansson". Retrieved March 14, 2020.
46. "Professional boxing record: Sonny Liston". Retrieved March 14, 2020.
47. "Professional boxing record: Leon Spinks". Retrieved March 14, 2020.
48. "Professional boxing record: James Douglas". Retrieved March 19, 2020.
49. Fischer, Doug (May 1, 2020). "Dougie's Friday mailbag (rating Wladimir Klitschko, Calzaghe vs. Conn, Parker vs. Fa)". The Ring. Retrieved May 3, 2020.
50. "Professional boxing record: Herbie Hide". Retrieved March 19, 2020.
51. "Professional boxing record: Lamon Brewster". Retrieved March 21, 2020.
52. "Professional boxing record: James Smith". Retrieved March 18, 2020.
53. "Foreman Relinquishes IBF Title". Retrieved March 30, 2020.
54. "Vitali Klitschko vacates title". Retrieved March 30, 2020.
55. "Professional boxing record: Oleg Maskaev". Retrieved March 21, 2020.
56. "Lewis bows out as champion". Retrieved March 30, 2020.
57. "WBO world heavyweight championship". Retrieved March 14, 2020.
58. "Professional boxing record: Michael Dokes". Retrieved March 15, 2020.
59. "Professional boxing record: John Tate". Retrieved March 15, 2020.
60. "Professional boxing record: Charles Martin". Retrieved March 20, 2020.
61. "Professional boxing record: Tony Tubbs". Retrieved March 15, 2020.
62. "Professional boxing record: Joseph Parker". Retrieved March 20, 2020.
63. "Professional boxing record: Sultan Ibragimov". Retrieved March 21, 2020.
64. "1885-08-29: John L. Sullivan vs. Dominick McCaffrey". BoxRec. Retrieved October 11, 2017.
65. "Jack Dempsey biography on BoxRec". BoxRec. Retrieved October 11, 2017.
66. "Professional boxing record: Jack Sharkey". Retrieved March 14, 2020.
67. "Reveille vol. 38, Nov. 4, 1964 (p. 23)". Reveille. Archived from the original on March 19, 2018. Retrieved March 29, 2018.
68. James B. Roberts,Alexander G. Skutt: The Boxing Register: International Boxing Hall of Fame Official Record Book (p. 50)
69. "History of the WBC". World Boxing Council. Retrieved October 11, 2017.
70. John Sugden: Boxing and Society: An International Analysis (p. 49)
71. "History of IBF/USBA". International Boxing Federation. Retrieved October 11, 2017.
72. former champion Michael Bentt holds both British and American citizenship.
73. "Professional boxing record: Nikolai Valuev". Retrieved March 21, 2020.
74. "Professional boxing record: John Ruiz". Retrieved March 20, 2020.
75. "Professional boxing record: Michael Moorer". Retrieved March 19, 2020.
76. "Professional boxing record: Frank Bruno". Retrieved March 19, 2020.
77. "Professional boxing record: David Haye". Retrieved March 21, 2020.
78. "Professional boxing record: Trevor Berbick". Retrieved March 18, 2020.
79. "Professional boxing record: Bermane Stiverne". Retrieved March 21, 2020.
80. "Professional boxing record: Ruslan Chagaev". Retrieved March 20, 2020.
81. "Professional boxing record: Gerrie Coetzee". Retrieved March 15, 2020.
82. "Professional boxing record: Corrie Sanders". Retrieved March 20, 2020.
83. "Professional boxing record: Siarhei Liakhovich". Retrieved March 21, 2020.
84. "Professional boxing record: Samuel Peter". Retrieved March 21, 2020.
85. "Professional boxing record: Andy Ruiz Jr". Retrieved March 20, 2020.

External links

• World Heavyweight Title Records and Statistics
• Statistical tables of heavyweight world championships
• The BoxRec – Boxing's Official Record Keeper
• The BoxRec Wiki Encyclopedia
• The Ring Magazine's Annual Ratings
• The Boxing Register: International Boxing Hall Of Fame Official Record Book (archive)