Former four-division world champion Floyd ‘Money’ Mayweather, 50-0, outlasted former heavyweight champion Rocky Marciano 49-0 in August 2017 and stopped MMA champion Connor McGregor in his ten-round boxing debut. Some feel a * should be besides his 50-0 record, and I am one of them.
Some exited undefeated, and others undefeated with a draw or two. WBO super middleweight champion Joe Calzaghe, 46-0 from Wales, retired due to bad hands. He came to the US and Bernard ‘The Executioner’ Hopkins and Roy Jones, Jr. defeated, which ended his career.
Ricardo ‘Finito’ Lopez, Jr., 51-0-1 was WBA Mini and IBF light flyweight champion after drawing with Rosendo Alvarez won the rematch. He was 47-0 when they drew.
Jimmy ‘Little Tiger’ Barry, 59-0-10, world bantamweight champion, has drawn in his last eight fights.
Italy’s EBU champion Nino LaRocca, 74-6, was 56-0 when he lost.
Thailand’s WBC Mini World Champion Chayaphon Moonsri, 55-3, was 54-0 when he lost.
Heavyweight champion Larry, ‘The Easton Assassin’, was 48-0 when he lost to Olympic and then light heavyweight champion Michael Spinks.
‘Super’ Brian Nielsen, 64-3, of Denmark, was 49-0 when he lost to Dicky Ryan and won the rematch.
Lee Sala was 48-0 when he lost to Tony DeMicco and won the rematch.
Thailand’s Tasama Salapat, 76-2 with 53 knockouts, was 48-0 when he lost to Takuma Inoue.
IBF Lightweight Champion Paul ‘The Pittsburgh Kid’ Spadafora was 49-1-1 and 48-0-1 when he lost to Johan Perez.
Heavyweight champion Deontay ‘The Bronze Bomber’ Wilder was 42-0-1 when he lost to Tyson Fury.
Former Super Middleweight and Cruiserweight Champion Gilberto ‘El Zurdo’ Ramirez, 46-1, was 44-0 when he lost to Dimitrii Bivol.
Three-division world champion Mexico’s Julio ‘JC’ Cesar Chavez, 107-6-2, was 89-0-1 when he lost to Frankie ‘The Surgeon’ Randall and won the rematch.
Light welterweight champion Aaron ‘Hawk’ Pryor, 39-1, was 36-0 when he returned from a two-year layoff against Bobby Joe Young.
Denmark’s Tom Boggs, 77-8-1, was 53-0-1 when he lost to Emile Griffith.
Brazil’s two-division world champion Eder Jofre, 72-2-4, was 47-0-3 when he lost to Fighting Harada.
Poland’s two-division world champion Dariusz Michalczewski, 48-2, was 48-0 when he lost to Julio Cesar Gonzalez.
World featherweight champion Willie ‘Will o’ the Wisp’ Pep, 229-11-1, was 62-0 when he lost to Sammy Angott.
Former WBO Light Middleweight Champion Mexico’s Jaime Munguia, 44-1, was 43-0 when he lost to Saul ‘Canelo’ Alvarez.
Two-division world champion ‘Sugar’ Ray Robinson, 174-19-6, was 40-0 when he lost to Jake LaMotta. He would defeat La Motta four times in their career.
Light and heavyweight champion Gene ‘The Fighting Marine’ Tunney, 80-1-3, was 47-0-2 when he lost to Harry Greb.
Heavyweight champion Russian Nikolai ‘The Russian Giant’ Valuev, 50-2, was 46-0 when he lost to Ruslan Chagaev.
Two-division world champion Italy’s Nino Benvenutti, 82-7-1, was 65-0 when he lost to Ki Soo Kim.
I’m sure readers will come up with other names.
