Undisputed championship (boxing)
Updated: 12/11/2025, 6:13:49 PM Wikipedia source
In boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world titles from all major organizations recognized by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, WBO, and IBF. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have been only 24 boxers (11 male and 13 female) to hold all four titles simultaneously.
Tables
· Unified championship › Current unified champions
Mini flyweight
Mini flyweight
Weight class
Mini flyweight
Champion
Oscar Collazo
Recognition
WBA, WBO
Consec. defenses
2
Reign began
November 16, 2024
Light flyweight
Light flyweight
Weight class
Light flyweight
Champion
vacant
Flyweight
Flyweight
Weight class
Flyweight
Champion
Ricardo Sandoval
Recognition
WBA, WBC
Consec. defenses
0
Reign began
July 30, 2025
Super flyweight
Super flyweight
Weight class
Super flyweight
Champion
Jesse Rodriguez
Recognition
WBA, WBC, WBO
Consec. defenses
1
Reign began
July 19, 2025
Bantamweight
Bantamweight
Weight class
Bantamweight
Champion
vacant
Super bantamweight
Super bantamweight
Weight class
Super bantamweight
Champion
Naoya Inoue
Recognition
WBA, WBC, IBF, WBO
Consec. defenses
6
Reign began
July 23, 2023
Featherweight
Featherweight
Weight class
Featherweight
Champion
vacant
Super featherweight
Super featherweight
Weight class
Super featherweight
Champion
vacant
Lightweight
Lightweight
Weight class
Lightweight
Champion
vacant
Light welterweight
Light welterweight
Weight class
Light welterweight
Champion
vacant
Welterweight
Welterweight
Weight class
Welterweight
Champion
vacant
Light middleweight
Light middleweight
Weight class
Light middleweight
Champion
vacant
Middleweight
Middleweight
Weight class
Middleweight
Champion
Janibek Alimkhanuly
Recognition
IBF, WBO
Consec. defenses
1
Reign began
October 14, 2023
Super middleweight
Super middleweight
Weight class
Super middleweight
Champion
Terence Crawford
Recognition
WBA, IBF, WBO
Consec. defenses
0
Reign began
September 13, 2025
Light heavyweight
Light heavyweight
Weight class
Light heavyweight
Champion
Dmitry Bivol
Recognition
WBA, IBF, WBO
Consec. defenses
0
Reign began
February 22, 2025
Cruiserweight
Cruiserweight
Weight class
Cruiserweight
Champion
Gilberto Ramírez
Recognition
WBA, WBO
Consec. defenses
1
Reign began
November 16, 2024
Heavyweight
Heavyweight
Weight class
Heavyweight
Champion
Oleksandr Usyk
Recognition
WBA, WBC, IBF
Consec. defenses
5
Reign began
September 25, 2021
| Weight class | Champion | Recognition | Consec. defenses | Reign began |
| Mini flyweight | Oscar Collazo | WBA, WBO | 2 | November 16, 2024 |
| Light flyweight | vacant | |||
| Flyweight | Ricardo Sandoval | WBA, WBC | 0 | July 30, 2025 |
| Super flyweight | Jesse Rodriguez | WBA, WBC, WBO | 1 | July 19, 2025 |
| Bantamweight | vacant | |||
| Super bantamweight | Naoya Inoue | WBA, WBC, IBF, WBO | 6 | July 23, 2023 |
| Featherweight | vacant | |||
| Super featherweight | vacant | |||
| Lightweight | vacant | |||
| Light welterweight | vacant | |||
| Welterweight | vacant | |||
| Light middleweight | vacant | |||
| Middleweight | Janibek Alimkhanuly | IBF, WBO | 1 | October 14, 2023 |
| Super middleweight | Terence Crawford | WBA, IBF, WBO | 0 | September 13, 2025 |
| Light heavyweight | Dmitry Bivol | WBA, IBF, WBO | 0 | February 22, 2025 |
| Cruiserweight | Gilberto Ramírez | WBA, WBO | 1 | November 16, 2024 |
| Heavyweight | Oleksandr Usyk | WBA, WBC, IBF | 5 | September 25, 2021 |
· Unified championship › Women's current unified champions
Mini flyweight
Mini flyweight
Weight class → Atomweight
Mini flyweight
Champion → Christina Rupprecht
vacant
Light flyweight
Light flyweight
Weight class → Atomweight
Light flyweight
Champion → Christina Rupprecht
Evelin Bermúdez
Recognition → WBC, WBO, WBA, IBF
WBA, IBF, WBO
Consec. defenses → 1
4
Reign began → November 23, 2024
March 10, 2023
Flyweight
Flyweight
Weight class → Atomweight
Flyweight
Champion → Christina Rupprecht
Gabriela Fundora
Recognition → WBC, WBO, WBA, IBF
IBF, WBA, WBC, WBO
Consec. defenses → 1
1
Reign began → November 23, 2024
November 2, 2024
Super flyweight
Super flyweight
Weight class → Atomweight
Super flyweight
Champion → Christina Rupprecht
vacant
Bantamweight
Bantamweight
Weight class → Atomweight
Bantamweight
Champion → Christina Rupprecht
Cherneka Johnson
Recognition → WBC, WBO, WBA, IBF
WBA, WBC, IBF, WBO
Consec. defenses → 1
0
Reign began → November 23, 2024
July 11, 2025
Super bantamweight
Super bantamweight
Weight class → Atomweight
Super bantamweight
Champion → Christina Rupprecht
Ellie Scotney
Recognition → WBC, WBO, WBA, IBF
WBC, IBF, WBO
Consec. defenses → 1
2
Reign began → November 23, 2024
April 13, 2024
Featherweight
Featherweight
Weight class → Atomweight
Featherweight
Champion → Christina Rupprecht
Amanda Serrano
Recognition → WBC, WBO, WBA, IBF
WBA, WBC, IBF, WBO
Consec. defenses → 1
6
Reign began → November 23, 2024
February 4, 2021
Super featherweight
Super featherweight
Weight class → Atomweight
Super featherweight
Champion → Christina Rupprecht
Alycia Baumgardner
Recognition → WBC, WBO, WBA, IBF
WBA, WBC, IBF, WBO
Consec. defenses → 1
3
Reign began → November 23, 2024
November 13, 2021
Lightweight
Lightweight
Weight class → Atomweight
Lightweight
Champion → Christina Rupprecht
vacant
Light welterweight
Light welterweight
Weight class → Atomweight
Light welterweight
Champion → Christina Rupprecht
Katie Taylor
Recognition → WBC, WBO, WBA, IBF
WBA, IBF, WBO
Consec. defenses → 1
2
Reign began → November 23, 2024
November 25, 2023
Welterweight
Welterweight
Weight class → Atomweight
Welterweight
Champion → Christina Rupprecht
Lauren Price
Recognition → WBC, WBO, WBA, IBF
WBA, WBC, IBF
Consec. defenses → 1
0
Reign began → November 23, 2024
March 7, 2025
Light middleweight
Light middleweight
Weight class → Atomweight
Light middleweight
Champion → Christina Rupprecht
Ema Kozin
Recognition → WBC, WBO, WBA, IBF
WBC, WBO
Consec. defenses → 1
0
Reign began → November 23, 2024
November 18, 2023
Middleweight
Middleweight
Weight class → Atomweight
Middleweight
Champion → Christina Rupprecht
Desley Robinson
Recognition → WBC, WBO, WBA, IBF
IBF, WBO
Consec. defenses → 1
0
Reign began → November 23, 2024
April 11, 2025
Super middleweight
Super middleweight
Weight class → Atomweight
Super middleweight
Champion → Christina Rupprecht
Franchón Crews-Dezurn
Recognition → WBC, WBO, WBA, IBF
WBC, WBA
Consec. defenses → 1
1
Reign began → November 23, 2024
March 24, 2024
Super middleweight
Super middleweight
Weight class → Atomweight
Super middleweight
Champion → Christina Rupprecht
Shadasia Green
Recognition → WBC, WBO, WBA, IBF
WBO, IBF
Consec. defenses → 1
0
Reign began → November 23, 2024
July 11, 2025
Light heavyweight
Light heavyweight
Weight class → Atomweight
Light heavyweight
Champion → Christina Rupprecht
vacant
Heavyweight
Heavyweight
Weight class → Atomweight
Heavyweight
Champion → Christina Rupprecht
Claressa Shields
Recognition → WBC, WBO, WBA, IBF
WBC, WBA, IBF, WBO
Consec. defenses → 1
1
Reign began → November 23, 2024
July 27, 2024
| Weight class | Champion | Recognition | Consec. defenses | Reign began |
| Atomweight | Christina Rupprecht | WBC, WBO, WBA, IBF | 1 | November 23, 2024 |
| Mini flyweight | vacant | |||
| Light flyweight | Evelin Bermúdez | WBA, IBF, WBO | 4 | March 10, 2023 |
| Flyweight | Gabriela Fundora | IBF, WBA, WBC, WBO | 1 | November 2, 2024 |
| Super flyweight | vacant | |||
| Bantamweight | Cherneka Johnson | WBA, WBC, IBF, WBO | 0 | July 11, 2025 |
| Super bantamweight | Ellie Scotney | WBC, IBF, WBO | 2 | April 13, 2024 |
| Featherweight | Amanda Serrano | WBA, WBC, IBF, WBO | 6 | February 4, 2021 |
| Super featherweight | Alycia Baumgardner | WBA, WBC, IBF, WBO | 3 | November 13, 2021 |
| Lightweight | vacant | |||
| Light welterweight | Katie Taylor | WBA, IBF, WBO | 2 | November 25, 2023 |
| Welterweight | Lauren Price | WBA, WBC, IBF | 0 | March 7, 2025 |
| Light middleweight | Ema Kozin | WBC, WBO | 0 | November 18, 2023 |
| Middleweight | Desley Robinson | IBF, WBO | 0 | April 11, 2025 |
| Super middleweight | Franchón Crews-Dezurn | WBC, WBA | 1 | March 24, 2024 |
| Super middleweight | Shadasia Green | WBO, IBF | 0 | July 11, 2025 |
| Light heavyweight | vacant | |||
| Heavyweight | Claressa Shields | WBC, WBA, IBF, WBO | 1 | July 27, 2024 |
· Unified championship › Most wins in unified championship bouts
Wladimir Klitschko
Wladimir Klitschko
Col 1
1.
Name
Wladimir Klitschko
Title recognition
WBA, IBF, WBO
Division
Heavyweight
Title bout wins
15
José Nápoles
José Nápoles
Col 1
2.
Name
José Nápoles
Title recognition
WBA, WBC
Division
Welterweight
Title bout wins
14
WBA, WBC
WBA, WBC
Col 1
Muhammad Ali
Name
WBA, WBC
Title recognition
Heavyweight
WBA, WBC, IBF, WBO
WBA, WBC, IBF, WBO
Col 1
Naoya Inoue
Name
WBA, WBC, IBF, WBO
Title recognition
BantamweightSuper Bantamweight
Marvin Hagler
Marvin Hagler
Col 1
5.
Name
Marvin Hagler
Title recognition
WBA, WBC, IBF
Division
Middleweight
Title bout wins
13
Carlos Monzón
Carlos Monzón
Col 1
6.
Name
Carlos Monzón
Title recognition
WBA, WBC
Division
Middleweight
Title bout wins
12
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Roy Jones Jr.
Name
WBA, WBC, IBF
Title recognition
Light heavyweight
Evander Holyfield
Evander Holyfield
Col 1
8.
Name
Evander Holyfield
Title recognition
WBA, WBC, IBF
Division
HeavyweightCruiserweight
Title bout wins
11
Bob Foster
Bob Foster
Col 1
9.
Name
Bob Foster
Title recognition
WBA, WBC
Division
Light heavyweight
Title bout wins
10
WBA, WBC
WBA, WBC
Col 1
Carlos Ortiz
Name
WBA, WBC
Title recognition
Lightweight
Bernard Hopkins
Bernard Hopkins
Col 1
11.
Name
Bernard Hopkins
Title recognition
WBA, WBC, IBF, WBO
Division
Light heavyweightMiddleweight
Title bout wins
9
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Mike Tyson
Name
WBA, WBC, IBF
Title recognition
Heavyweight
Emile Griffith
Emile Griffith
Col 1
13.
Name
Emile Griffith
Title recognition
WBA, WBC
Division
MiddleweightWelterweight
Title bout wins
8
WBA, WBC
WBA, WBC
Col 1
Nino Benvenuti
Name
WBA, WBC
Title recognition
MiddleweightLight middleweight
WBA, WBC
WBA, WBC
Col 1
Vicente Saldivar
Name
WBA, WBC
Title recognition
Featherweight
Pernell Whitaker
Pernell Whitaker
Col 1
16.
Name
Pernell Whitaker
Title recognition
WBA, WBC, IBF
Division
Lightweight
Title bout wins
7
Terence Crawford
Terence Crawford
Col 1
17.
Name
Terence Crawford
Title recognition
WBA, WBC, IBF, WBO
Division
Light welterweightWelterweightSuper middleweight
Title bout wins
6
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Lennox Lewis
Name
WBA, WBC, IBF
Title recognition
Heavyweight
WBA, IBF, WBO
WBA, IBF, WBO
Col 1
Juan Manuel Márquez
Name
WBA, IBF, WBO
Title recognition
LightweightFeatherweight
WBA, WBC
WBA, WBC
Col 1
Gabriel Elorde
Name
WBA, WBC
Title recognition
Super featherweight
WBA, WBC
WBA, WBC
Col 1
Rubén Olivares
Name
WBA, WBC
Title recognition
Bantamweight
Floyd Mayweather Jr.
Floyd Mayweather Jr.
Col 1
22.
Name
Floyd Mayweather Jr.
Title recognition
WBA, WBC
Division
Light middleweightWelterweight
Title bout wins
5
WBA, WBC
WBA, WBC
Col 1
Dick Tiger
Name
WBA, WBC
Title recognition
Light heavyweightMiddleweight
WBA, IBF, WBO
WBA, IBF, WBO
Col 1
Sergey Kovalev
Name
WBA, IBF, WBO
Title recognition
Light heavyweight
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Gennady Golovkin
Name
WBA, WBC, IBF
Title recognition
Middleweight
WBA, WBC
WBA, WBC
Col 1
Fighting Harada
Name
WBA, WBC
Title recognition
Bantamweight
WBA, WBC
WBA, WBC
Col 1
Joe Frazier
Name
WBA, WBC
Title recognition
Heavyweight
WBA, WBC
WBA, WBC
Col 1
Kostya Tszyu
Name
WBA, WBC
Title recognition
Light welterweight
WBA, IBF
WBA, IBF
Col 1
Sven Ottke
Name
WBA, IBF
Title recognition
Super middleweight
WBC, IBF
WBC, IBF
Col 1
Terry Norris
Name
WBC, IBF
Title recognition
Light middleweight
Andre Ward
Andre Ward
Col 1
31.
Name
Andre Ward
Title recognition
WBA, WBC, IBF, WBO
Division
Light heavyweightSuper middleweight
Title bout wins
4
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Julio César Chávez
Name
WBA, WBC, IBF
Title recognition
Light welterweightLightweight
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Vic Darchinyan
Name
WBA, WBC, IBF
Title recognition
Super flyweight
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
George Foreman
Name
WBA, WBC, IBF
Title recognition
Heavyweight
WBA, WBO
WBA, WBO
Col 1
Guillermo Rigondeaux
Name
WBA, WBO
Title recognition
Super bantamweight
WBC, IBF
WBC, IBF
Col 1
Humberto González
Name
WBC, IBF
Title recognition
Light flyweight
WBO, IBF
WBO, IBF
Col 1
Naseem Hamed
Name
WBO, IBF
Title recognition
Featherweight
WBA, IBF, WBO
WBA, IBF, WBO
Col 1
Anthony Joshua
Name
WBA, IBF, WBO
Title recognition
Heavyweight
| Name | Title recognition | Division | Title bout wins | |
| 1. | Wladimir Klitschko | WBA, IBF, WBO | Heavyweight | 15 |
| 2. | José Nápoles | WBA, WBC | Welterweight | 14 |
| Muhammad Ali | WBA, WBC | Heavyweight | ||
| Naoya Inoue | WBA, WBC, IBF, WBO | BantamweightSuper Bantamweight | ||
| 5. | Marvin Hagler | WBA, WBC, IBF | Middleweight | 13 |
| 6. | Carlos Monzón | WBA, WBC | Middleweight | 12 |
| Roy Jones Jr. | WBA, WBC, IBF | Light heavyweight | ||
| 8. | Evander Holyfield | WBA, WBC, IBF | HeavyweightCruiserweight | 11 |
| 9. | Bob Foster | WBA, WBC | Light heavyweight | 10 |
| Carlos Ortiz | WBA, WBC | Lightweight | ||
| 11. | Bernard Hopkins | WBA, WBC, IBF, WBO | Light heavyweightMiddleweight | 9 |
| Mike Tyson | WBA, WBC, IBF | Heavyweight | ||
| 13. | Emile Griffith | WBA, WBC | MiddleweightWelterweight | 8 |
| Nino Benvenuti | WBA, WBC | MiddleweightLight middleweight | ||
| Vicente Saldivar | WBA, WBC | Featherweight | ||
| 16. | Pernell Whitaker | WBA, WBC, IBF | Lightweight | 7 |
| 17. | Terence Crawford | WBA, WBC, IBF, WBO | Light welterweightWelterweightSuper middleweight | 6 |
| Lennox Lewis | WBA, WBC, IBF | Heavyweight | ||
| Juan Manuel Márquez | WBA, IBF, WBO | LightweightFeatherweight | ||
| Gabriel Elorde | WBA, WBC | Super featherweight | ||
| Rubén Olivares | WBA, WBC | Bantamweight | ||
| 22. | Floyd Mayweather Jr. | WBA, WBC | Light middleweightWelterweight | 5 |
| Dick Tiger | WBA, WBC | Light heavyweightMiddleweight | ||
| Sergey Kovalev | WBA, IBF, WBO | Light heavyweight | ||
| Gennady Golovkin | WBA, WBC, IBF | Middleweight | ||
| Fighting Harada | WBA, WBC | Bantamweight | ||
| Joe Frazier | WBA, WBC | Heavyweight | ||
| Kostya Tszyu | WBA, WBC | Light welterweight | ||
| Sven Ottke | WBA, IBF | Super middleweight | ||
| Terry Norris | WBC, IBF | Light middleweight | ||
| 31. | Andre Ward | WBA, WBC, IBF, WBO | Light heavyweightSuper middleweight | 4 |
| Julio César Chávez | WBA, WBC, IBF | Light welterweightLightweight | ||
| Vic Darchinyan | WBA, WBC, IBF | Super flyweight | ||
| George Foreman | WBA, WBC, IBF | Heavyweight | ||
| Guillermo Rigondeaux | WBA, WBO | Super bantamweight | ||
| Humberto González | WBC, IBF | Light flyweight | ||
| Naseem Hamed | WBO, IBF | Featherweight | ||
| Anthony Joshua | WBA, IBF, WBO | Heavyweight |
· Unified championship › Most consecutive defenses of unified title
Wladimir Klitschko
Wladimir Klitschko
Col 1
1.
Name
Wladimir Klitschko
Title recognition
WBA, IBF, WBO
Division
Heavyweight
Consec. defenses
14
Marvin Hagler
Marvin Hagler
Col 1
2.
Name
Marvin Hagler
Title recognition
WBA, WBC, IBF
Division
Middleweight
Consec. defenses
12
Muhammad Ali
Muhammad Ali
Col 1
3.
Name
Muhammad Ali
Title recognition
WBA, WBC
Division
Heavyweight
Consec. defenses
10
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Roy Jones Jr.
Name
WBA, WBC, IBF
Title recognition
Light heavyweight
Carlos Monzón
Carlos Monzón
Col 1
5.
Name
Carlos Monzón
Title recognition
WBA, WBC
Division
Middleweight
Consec. defenses
9
Mike Tyson
Mike Tyson
Col 1
6.
Name
Mike Tyson
Title recognition
WBA, WBC, IBF
Division
Heavyweight
Consec. defenses
8
Bernard Hopkins
Bernard Hopkins
Col 1
7.
Name
Bernard Hopkins
Title recognition
WBA, WBC, IBF, WBO
Division
Middleweight
Consec. defenses
7
WBA, WBC
WBA, WBC
Col 1
Vicente Saldivar
Name
WBA, WBC
Title recognition
Featherweight
Naoya Inoue
Naoya Inoue
Col 1
9.
Name
Naoya Inoue
Title recognition
WBC, WBO
Division
Super Bantanmweight
Consec. defenses
6
WBA, WBC
WBA, WBC
Col 1
José Nápoles
Name
WBA, WBC
Title recognition
Welterweight
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Pernell Whitaker
Name
WBA, WBC, IBF
Title recognition
Lightweight
Bob Foster
Bob Foster
Col 1
12.
Name
Bob Foster
Title recognition
WBA, WBC
Division
Light heavyweight
Consec. defenses
5
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Gennady Golovkin
Name
WBA, WBC, IBF
Title recognition
Middleweight
WBA, WBC
WBA, WBC
Col 1
Carlos Ortiz
Name
WBA, WBC
Title recognition
Lightweight
WBA, WBC
WBA, WBC
Col 1
Gabriel Elorde
Name
WBA, WBC
Title recognition
Super featherweight
Nino Benvenuti
Nino Benvenuti
Col 1
16.
Name
Nino Benvenuti
Title recognition
WBA, WBC
Division
Middleweight
Consec. defenses
4
WBA, IBF, WBO
WBA, IBF, WBO
Col 1
Sergey Kovalev
Name
WBA, IBF, WBO
Title recognition
Light heavyweight
WBA, WBC
WBA, WBC
Col 1
Fighting Harada
Name
WBA, WBC
Title recognition
Bantamweight
WBA, WBC
WBA, WBC
Col 1
Joe Frazier
Name
WBA, WBC
Title recognition
Heavyweight
WBA, WBC
WBA, WBC
Col 1
Kostya Tszyu
Name
WBA, WBC
Title recognition
Light welterweight
WBA, IBF
WBA, IBF
Col 1
Sven Ottke
Name
WBA, IBF
Title recognition
Super middleweight
WBC, IBF
WBC, IBF
Col 1
Terry Norris
Name
WBC, IBF
Title recognition
Light middleweight
Floyd Mayweather Jr.
Floyd Mayweather Jr.
Col 1
23.
Name
Floyd Mayweather Jr.
Title recognition
WBA, WBC
Division
Welterweight
Consec. defenses
3
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Evander Holyfield
Name
WBA, WBC, IBF
Title recognition
Heavyweight
WBA, WBC, IBF, WBO
WBA, WBC, IBF, WBO
Col 1
Terence Crawford
Name
WBA, WBC, IBF, WBO
Title recognition
Light welterweight
WBC, IBF
WBC, IBF
Col 1
Humberto González
Name
WBC, IBF
Title recognition
Light flyweight
WBA, IBF
WBA, IBF
Col 1
Juan Manuel Márquez
Name
WBA, IBF
Title recognition
Featherweight
WBA, WBC, IBF
WBA, WBC, IBF
Col 1
Vic Darchinyan
Name
WBA, WBC, IBF
Title recognition
Super flyweight
WBC, IBF
WBC, IBF
Col 1
Lennox Lewis
Name
WBC, IBF
Title recognition
Heavyweight
WBA, WBO
WBA, WBO
Col 1
Guillermo Rigondeaux
Name
WBA, WBO
Title recognition
Super bantamweight
WBA, IBF, WBO
WBA, IBF, WBO
Col 1
Anthony Joshua
Name
WBA, IBF, WBO
Title recognition
Heavyweight
| Name | Title recognition | Division | Consec. defenses | |
| 1. | Wladimir Klitschko | WBA, IBF, WBO | Heavyweight | 14 |
| 2. | Marvin Hagler | WBA, WBC, IBF | Middleweight | 12 |
| 3. | Muhammad Ali | WBA, WBC | Heavyweight | 10 |
| Roy Jones Jr. | WBA, WBC, IBF | Light heavyweight | ||
| 5. | Carlos Monzón | WBA, WBC | Middleweight | 9 |
| 6. | Mike Tyson | WBA, WBC, IBF | Heavyweight | 8 |
| 7. | Bernard Hopkins | WBA, WBC, IBF, WBO | Middleweight | 7 |
| Vicente Saldivar | WBA, WBC | Featherweight | ||
| 9. | Naoya Inoue | WBC, WBO | Super Bantanmweight | 6 |
| José Nápoles | WBA, WBC | Welterweight | ||
| Pernell Whitaker | WBA, WBC, IBF | Lightweight | ||
| 12. | Bob Foster | WBA, WBC | Light heavyweight | 5 |
| Gennady Golovkin | WBA, WBC, IBF | Middleweight | ||
| Carlos Ortiz | WBA, WBC | Lightweight | ||
| Gabriel Elorde | WBA, WBC | Super featherweight | ||
| 16. | Nino Benvenuti | WBA, WBC | Middleweight | 4 |
| Sergey Kovalev | WBA, IBF, WBO | Light heavyweight | ||
| Fighting Harada | WBA, WBC | Bantamweight | ||
| Joe Frazier | WBA, WBC | Heavyweight | ||
| Kostya Tszyu | WBA, WBC | Light welterweight | ||
| Sven Ottke | WBA, IBF | Super middleweight | ||
| Terry Norris | WBC, IBF | Light middleweight | ||
| 23. | Floyd Mayweather Jr. | WBA, WBC | Welterweight | 3 |
| Evander Holyfield | WBA, WBC, IBF | Heavyweight | ||
| Terence Crawford | WBA, WBC, IBF, WBO | Light welterweight | ||
| Humberto González | WBC, IBF | Light flyweight | ||
| Juan Manuel Márquez | WBA, IBF | Featherweight | ||
| Vic Darchinyan | WBA, WBC, IBF | Super flyweight | ||
| Lennox Lewis | WBC, IBF | Heavyweight | ||
| Guillermo Rigondeaux | WBA, WBO | Super bantamweight | ||
| Anthony Joshua | WBA, IBF, WBO | Heavyweight |
References
- Becoming Holyfield: A Fighter's Journeyhttps://archive.org/details/becomingholyfiel00holy/page/123
- Encartahttps://web.archive.org/web/20080605161027/http://ca.encarta.msn.com/encyclopedia_761571782_5/Boxing.html
- The Guinness World Championship Boxing book
- Boxing Dictionary
- Morrison, pp.14–15
- A pictorial history of boxing
- New York Timeshttps://www.nytimes.com/1941/11/25/archives/phelan-to-check-on-title-rivals-boxing-official-to-see-zale-and.html?sq=undisputed+boxing&scp=15&st=p
- "Reveille vol. 38, Nov. 4, 1964 (p. 23)"https://web.archive.org/web/20180319213531/https://reveille.dlconsulting.com/cgi-bin/reveille?a=d&d=RV196411.1.23
- James B. Roberts, Alexander G. Skutt: The Boxing Register: International Boxing Hall of Fame Official Record Book (p. 50
- "History of the WBC"https://web.archive.org/web/20170730022228/http://wbcboxing.com/wbceng/about-wbc/21-cmb/90-historia
- John Sugden: Boxing and Society: An International Analysis (p. 49)
- "History of IBF/USBA"https://web.archive.org/web/20171003043205/http://ibfusbaregistration.com/ibfusba_02APR2014/index.php/about/history-of-ibf
- "IBF/USBA History"http://www.ibf-usba-boxing.com/index.php?pg=2
- New York Timeshttps://query.nytimes.com/gst/fullpage.html?res=9B0DE3D81E3CF931A3575BC0A961948260
- former champion Michael Bentt holds both British and American citizenship.
- "Super championships guidelines"https://web.archive.org/web/20011119165718/http://wbaonline.com/wchampionships/SuperChampionship.htm
- "WBC Bantamweight Ratings (incl. WBO)"https://web.archive.org/web/20040803120516/http://www.wbcboxing.com/WBCboxing/Portal/cfpages/contentmgr.cfm?docId=107&docTipo=4&orderby=docid&sortby=ASC
- pp.10–11https://web.archive.org/web/20141021120158/http://www.ibf-usba-boxing.com/userfiles/File/rules%20governing%20championship%20contests%20May%202006.pdf
- "IBF Ratings"https://web.archive.org/web/20070202042341/http://www.ibf-usba-boxing.com/
- Regulations of World Championship Contestshttps://web.archive.org/web/20110716094249/http://www.wbo-int.com/revised/08.10.01%20WBO%20Rules.pdf
- thesweetscience.comhttps://web.archive.org/web/20070516095208/http://www.thesweetscience.com/boxing-article/3224/waiting-zab-judah/
- Tampa Tribunehttp://www2.tbo.com/content/2008/feb/01/sp-campbell-ready-to-put-on-show/
- fightnightnews.comhttps://web.archive.org/web/20080526034636/http://www.fightnightnews.com/ronnie_shields_interview.html
- The New York Timeshttps://www.nytimes.com/1999/06/06/sports/boxing-roy-jones-becomes-undisputed-champion.html
- "The Lineal Light Heavyweight Champions"http://www.cyberboxingzone.com/boxing/lheavy.htm
- "The Disputed Light Heavyweight Champion of the World"https://web.archive.org/web/20110714051808/http://maxboxing.com/Kim/kim092602.asp
- "Taylor drops IBF belt for Hopkins"http://news.bbc.co.uk/sport1/low/boxing/4334016.stm
- ESPN.comhttps://www.espn.com/sports/boxing/columns/story?columnist=rafael_dan&id=2253841
- Sporting Lifehttp://www.sportinglife.com/boxing/news/story_get.cgi?STORY_NAME=boxing/05/12/04/BOXING_Las_Vegas.html
- USA Todayhttps://www.usatoday.com/sports/boxing/2007-11-03-calzaghe-kessler_N.htm
- "Calzaghe Outboxes Kessler To Become Undisputed World Champion"https://web.archive.org/web/20071105035740/http://www.secondsout.com/reports/index.cfm?ccs=529&cs=23157
- The Independent on Sundayhttps://www.independent.co.uk/sport/general/boxing-battler-calzaghe-triumphs-against-kessler-398962.html
- Sky Sportshttps://web.archive.org/web/20090112142224/http://msnsport.skysports.com/story/0,19528,12183_2848876,00.html
- eastsideboxing.comhttp://www.eastsideboxing.com/news.php?p=13117&more=1
- Boston Heraldhttp://www.bostonherald.com/sports/other_sports/boxing/view.bg?articleid=1043918
- 15rounds.comhttp://www.15rounds.com/darchinyan-keeps-promise-silences-critics/
- ESPN.comhttps://www.espn.co.uk/boxing/story/_/id/30137076/teofimo-lopez-upsets-vasiliy-lomachenko-become-youngest-four-belt-champion
- Sky Sportshttps://www.skysports.com/boxing/news/12183/11800795/has-the-wbcs-franchise-champion-brought-clarity-or-confusion
- ESPN.comhttps://www.espn.co.uk/boxing/story/_/id/27073915/wbc-franchise-title-just-make-sense
- [1] International Boxing Federation rules: governing championship contestshttps://web.archive.org/web/20180205000728/http://www.ibfusbaregistration.com/ibfusba_02APR2014/images/pdfs/IBFChampionshipContestRules0617.pdf
- [2] World Boxing Association rules and regulationshttps://www.wbaboxing.com/wp-content/uploads/2015/06/WBA-Rules-adopted-in-Bulgaria-6-11-15.pdf
- [3] World Boxing Organization: regulation of world championship contestshttps://www.wboboxing.com/wp-content/uploads/2011/05/130828-WBO-Regulations-of-World-Championship-Contests.pdf
- [4]World Boxing Association rules and regulations, January 2004https://web.archive.org/web/20080626130921/http://www.wbaonline.com/legal/LegalStatements/worldchampionships.pdf
- The Ringhttps://www.ringtv.com/669577-evelin-bermudez-stops-jessica-basulto-in-luna-park-stadiums-last-fight-card/
- BBC Sporthttps://www.bbc.com/sport/boxing/68808375
- BoxingScene.comhttps://www.boxingscene.com/amanda-serrano-upgraded-wbc-featherweight-titlist-mrdjenovich-named-emeritus-champion--155202
- Sky Sportshttps://www.skysports.com/boxing/news/12183/12468231/terri-harper-and-kid-galahad-lost-their-world-championships-after-both-being-knocked-out
- The Guardianhttps://www.theguardian.com/sport/2019/jun/01/katie-taylor-fight-undisputed-champion-delfine-persoon
- Yahoo Sportshttps://sports.yahoo.com/boxing/article/katie-taylor-vacates-wbc-title-to-take-break-from-boxing-christian-mbilli-vs-lester-martinez-rematch-ordered-235513869.html
- BoxingScene.comhttps://www.boxingscene.com/ema-kozin-bests-hannah-rankin-win-wbc-wbo-154-pound-titles-nathaniel-collins-edges-zak-miller--179356