Floyd Mayweather Jr. vs. Jose Luis Castillo I

The most debated fight in Floyd Mayweather Jr.'s undefeated career is unquestionably his first bout with Jose Luis Castillo on April 20, 2002. Mayweather was 27-0 and moving up to 135 pounds for the first time, where Castillo (45-4-1, 41 KO at the time) held the WBC's title.

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Sugar Ray Leonard vs. Pete Ranzany

Sugar Ray Leonard vs. Pete Ranzany

1979

Sugar Ray Leonard vs. Floyd Mayweather Sr

Sugar Ray Leonard vs. Floyd Mayweather Sr

1978

Sugar Ray Leonard vs. Kevin Howard

Sugar Ray Leonard vs. Kevin Howard

1984

Salvador Sanchez vs. Pat Cowdell

Salvador Sanchez vs. Pat Cowdell

1981

Salvador Sanchez vs. Danny Lopez I

Salvador Sanchez vs. Danny Lopez I

1980

Salvador Sanchez vs. Azumah Nelson

Salvador Sanchez vs. Azumah Nelson

1982

Shawtown Road

Shawtown Road

Hurricane

Floyd Mayweather Jr. vs. Genaro Hernández

1998

BMCLD

BMCLD

Oscar De La Hoya vs. Félix Trinidad

Oscar De La Hoya vs. Félix Trinidad

1999

Diego Corrales vs. José Luis Castillo II

Diego Corrales vs. José Luis Castillo II

2005

Keep going

Keep going

Floyd Mayweather Jr. vs. Carlos Hernandez

Floyd Mayweather Jr. vs. Carlos Hernandez

2001

Floyd Mayweather Jr. vs. Jose Luis Castillo II

Floyd Mayweather Jr. vs. Jose Luis Castillo II

2002

Floyd Mayweather Jr. vs. Victoriano Sosa

Floyd Mayweather Jr. vs. Victoriano Sosa

2003

Floyd Mayweather Jr. vs. Phillip Ndou

Floyd Mayweather Jr. vs. Phillip Ndou

2003

Steve Robinson vs. Naseem Hamed

Steve Robinson vs. Naseem Hamed

1995

Floyd Mayweather Jr. vs. Sharmba Mitchell

Floyd Mayweather Jr. vs. Sharmba Mitchell

2005

Lennox Lewis vs. Frank Bruno | WBC World Heavyweight Championship

Lennox Lewis vs. Frank Bruno | WBC World Heavyweight Championship

1993