Via Ken Hissner: According to the IBO Rankings, the following 27 are undefeated world champions:
WBC Tyson “The Gypsy King” Fury31-0-1, of the United Kingdom and live in Nevada, USA.
Fury won the WBC title in February 2020 in a rematch from his previous draw (in December 2018) against then-WBC champion Deontay “The Bronze Bomber” Wilder, 42-0-1, by stopping for 7 innings in Las Vegas, Nevada.
In October 2021, in Fury’s next fight, he had a third fight with Wilder, who fell three times and Fury fell twice. Fury scored a knockout goal in eleven innings to retain his title.
WBA, WBO and IBF Champion Alexander Usyk, 19-0 (13), in Shypyntsi, Ukraine. The former WBA, WBC, WBO and IBF heavyweight champion won the WBA, WBO and IBF heavyweight belts in September 2021, defeating Anthony “AJ” Joshua by decision.
WBA Champion Arsen “Feroz” Goulamirian, 26-0 (18), in Yerevan, Armenia and Big Bear Lake, California. In March 2028, he won the interim WBA title, stopping Ryad Merhy. In the next game, he won the WBA Gold title, stopping Mark Flanagan for nine innings.
In Goulamirian’s next game, he stopped Kane Watts for the WBA title. In December 2019, in his final fight, he stopped Constantin Bejenaru in nine rounds.
WBO . Champion Lawrence “The Sauce” Okolie, 17-0 (14), at Hackney, London, UK. In March 2021, he won the vacant WBO belt, stopping Krzysztof Glowacki for six rounds.
In his first defense in September 2021 and his last, he stopped Dilan Prasovic for three rounds in London. He is scheduled for February 27 in his first defense against Michal Cieslak, 21-1, in London.
WBA Champion Dmitry Bivol, 19-0 (11), of Kyrgyzstan and now in St.Petersburg, Russia. In March 2018, he won the title, stopping Trent Broadhurst.
Bivol has since made seven title defenses, including current WBO champion Joe Smith, Jr. In the final match in December 2021, he defeated Umar Salamov in Russia.
WBC and IBF Champion Artur Betterbiev, 17-0 (17), by RUS and Montreal, Canada. In November 2017, he won the vacant IBF title, stopping Enrico Koelling in Fresno, CA.
In October 2019, Bivol got another WBC title, stopping Oleksandr Gvozdyk for ten rounds in Philadelphia, PA. He made two defenses with his final game in December 2021, stopping Marcus Browne for nine rounds in Montreal, Canada.
Super middleweight: NOBODY
WBC Champion Jermall “Hit Man” Charlo, 32-0 (22), in Houston, Texas. In September 2015, he won the title of IBF Super Junior Champion. He defended it three times and fought twice afterwards; he won the interim WBC title by defeating Matvey Korobov in December 2018.
In June 2019, he won the WBC middleweight belt, defeating Brandon Adams in Houston, Texas. He has made three title defenses, with the last in June 2021 defeating Juan Macias Montiel in Houston, Texas.
WBO . middleweight champion Demetrius “Fuck” Andrade, 31-0, of Providence, RI, who just vacated his title and moved into super-middleweight. In March 2017, he won the WBA title defeating Jack Culcay in Germany.
Andrade has made seven title defenses, and in his final game in November 2021, he stopped Jason Quigley in New Hampshire.
Super Welterweight title: NO
WBO . Champion Terence “Bud” Crawford, 38-0 (29), by Omaha, Nebraska. He won in March 2014, stopping Ricky Burns in Scotland, UK.
Crawford has since made fifteen title defenses, including his last match in November 2021, stopping Shawn Porter in Las Vegas, Nevada.
IBF and WBC Champion Errol “Truth” Spence, Jr., 27-0 (21), in Desoto, Texas. In May 2017, he won the title. He stopped Kell Brook in Sheffield, UK.
Spence made three defenses before adding the WBC title in September 2019, defeating Shawn Porter. In December 2020, in his final match, he defeated former champion Danny “Swift” Garcia in Arlington, Texas.
WBA, WBC, WBO and IBF Josh ‘Tartan Tornado “Taylor, 18-0 (13), of Scotland, United Kingdom. In May 2019, he won the IBF title defeating Ivan Baranchyk. He added the WBA title in October 2019 Regis Prograis.
Taylor, after defending his belt he added a fourth title, the WBC and WBO title beat Jose Carlos Ramirez in his final match in May 2021. He is scheduled for the 26th. February match against Jack Catterall, 26-0, in Glasgow, Scotland, UK.
Champion of Super WBA, WBO, IBF George “ferocious” Kambosos, Jr., 20-0 (10, in Sydney, New South Wales, Australia.) He won the title in November 2021, beating Teofimo Lopez.
WBC Champion Devin “Dream” Haney, 27-0 (15), in Las Vegas, Nevada. He won the title in November 2019, defeating Alfredo Santiago in LA, CA.
He made three defenses, the last in December 2021, defeating Joseph Diaz in Las Vegas, Nevada.
WBA Champion Gervonta “Tank” Davis, 26-0 (24), in Baltimore, Maryland. He won the IBF World super featherweight title in January 2017, stopping Jose Pedraza.
In December 2019, Davis won the vacant WBA title by stopping Yuriorkis Gamboa. He made three defenses, including his final fight in December 2021, defeating Isaac Cruz in LA, CA.
Super light class:
WBC Champion Oscar Valdez, 30-0 (23), by Sonora, Mexico. He won the featherweight title in March 2018. He made two titles and two non-title fights.
Valdez, in February 2021, wins the WBC belt, stopping Miguel Berchelt in Las Vegas, Nevada. In his final match in September 2021, he defeated Robson Conceicao in Tucson, Arizona.
WBO . Champion Shakur “Fearless” Stevenson, 17-0 (9), by Alexandria, VA. In October 2019, he won the WBO world featherweight title. In June 2021, he won the interim WBO ultralightweight title.
In Stevenson’s final game in October 2021, he won the vacant WBO featherweight belt, stopping Jamel Herring in Atlanta, GA.
WBC Champion Bookmark “Magnifico” Magsayo, 24-0 (16), at Rizal, Metro Manila, Philippines. In January 2022, he defeated Gary Russel, Jr. in Atlantic City, New Jersey.
WBC and WBO Stephen “Cool Boy Steph” Fulton, 20-0 (8), of Philadelphia, PA. In November 2019, he won the IBO title. In January 2021, he won the WBO world title by defeating Angelo Leo.
In his final match in November 2021, he added a WBC title when he defeated Brandon Figueroa in Las Vegas, Nevada.
WBA and IBF Champion Murodjon “MJ” Akhmadeliev, 10-0 (7), by Chust, Uzbekistan and Indio, CA. In January 2020, he won the WBA and IBF titles by defeating Daniel Roman.
In November 2021, in his final match, Akhmadeliev defeated Jose Velasquez in Manchester, New Hampshire.
WBA and IBF Champion Naoya “Monster” Inoue, 22-0 (19), in Yokohama, Japan. In November 2019, he won the title, defeating Nonito Donaire. During his third title defense in his final match in December 2021, he stopped Aran Dipaen in Tokyo, Japan.
Super Flyweight Class: NOBODY
WBA Champion Artem Dalakian, 21-0 (15), by Baku, Azerbaijan and Kiev, UKR. He won the vacant title in February 2018, defeating Brian Viloria in Inglewood, CA.
In Dalakian’s final battle in November 2021, on his fifth defense, he stopped Luis Concepcion in Kiev, Ukraine.
IBF Champion It’s sunny “Showtime” Edwards, 17-0 (4), at Croydon, London, United Kingdom. In April 2021, he won the title defeating Moruti Mthalane in London, UK.
In Edwards’ final match in December 2021, he defeated Jason Mamain Coca-Cola, Dubai. He is scheduled to fight Muhammad Waseem on March 19.
WBO . Champion Junto Nakatani, 22-0 (17), by Sagamihara, Japan. He won the vacant title in November 2020, stopping Giemel Magramo in Tokyo, Japan. In his final fight in September 2021, he stopped Angel Acosta in Tucson, Arizona.
WBA Champion Hiroto Kyoguchi, 15-0 (10), in Tokyo, Japan. He won the title in December 2018, stopping Hekkie Budler in Macao, China.
During Kyoguchi’s third defense of his final battle, he stopped Axel AragonVega in Dallas, Texas.
WBA Champion Thammanoon “Knockout CP Freshmart” Niymtrong, 23-0 (9), by Surin, Thailand. He won the title in June 2016, defeating Byron Rojas in Thailand.
During Thammanoon’s final battle and 10th defense in December 2021, he stopped Robert Paradero in Phuket, Thailand.