Major Undefeated Champions in Boxing History

Retired with a near-perfect 51-0-1 record, known for his technical skill and 21 title defenses.

Retired undefeated with a 24-0 record, contributing significantly to women's boxing and following in her father's footsteps.

Finished his career with a 32-0 record, winning titles in two weight classes and defeating top fighters like Sergey Kovalev.

Had a perfect record of 27-0 with all wins by knockout, though his career was tragically cut short.

Retired with a flawless 50-0 record, winning titles in five different weight classes and defeating top opponents like Manny Pacquiao and Canelo Álvarez.

Retired with a perfect 46-0 record, unifying titles in the super middleweight division and defeating notable opponents like Bernard Hopkins.

The only heavyweight champion to retire undefeated with a 49-0 record, known for his powerful punching and relentless pressure.