<P> Floyd Joy Mayweather Jr. ( born Floyd Joy Sinclair ; February 24 , 1977 ) is an American professional boxing promoter and former professional boxer . He competed from 1996 to 2007 and 2009 to 2015 , and made a one - fight comeback in 2017 . During his career , he held 15 world titles in five weight classes and the lineal championship in four different weight classes ( twice at welterweight ) , and retired with an undefeated record of 50 -- 0 , surpassing Rocky Marciano 's record of 49 -- 0 . As an amateur , Mayweather won a bronze medal in the featherweight division at the 1996 Olympics , three U.S. Golden Gloves championships ( at light flyweight , flyweight , and featherweight ) , and the U.S. national championship at featherweight . </P>
<P> Floyd Joy Mayweather Jr. ( born Floyd Joy Sinclair ; February 24 , 1977 ) is an American professional boxing promoter and former professional boxer . He competed from 1996 to 2007 and 2009 to 2015 , and made a one - fight comeback in 2017 . During his career , he held 15 world titles in five weight classes and the lineal championship in four different weight classes ( twice at welterweight ) , and retired with an undefeated record of 50 -- 0 , surpassing Rocky Marciano 's record of 49 -- 0 . As an amateur , Mayweather won a bronze medal in the featherweight division at the 1996 Olympics , three U.S. Golden Gloves championships ( at light flyweight , flyweight , and featherweight ) , and the U.S. national championship at featherweight . </P>
who has the best boxing record of all times
who has the best boxing record of all times
Floyd Joy Mayweather Jr.
Floyd Joy Mayweather Jr.