Floyd Mayweather Jr. . He finished his career with a record of 26 wins without a loss or draw in world title fights ( 10 by KO ) ; 23 wins ( 9 KOs ) in lineal title fights ; 24 wins ( 7 KOs ) against former or current world titlists ; 12 wins ( 3 KOs ) against former or current lineal champions ; and 2 wins ( 1 KO ) against International Boxing Hall of Fame inductees .
Floyd Mayweather Jr. has a record 26 world title wins without a loss from boxing professionally.