Top 10 Greatest Boxers of All Time

Record 173-19-6 with 108 knockouts, Robinson is widely regarded as the greatest pound-for-pound boxer in history. He won the welterweight title and the middleweight title five times, with his 1951 bout against Jake LaMotta considered one of the finest performances in ring history.

Record 66-3 with 52 knockouts, the Brown Bomber reigned as heavyweight champion for a record 11 years and 8 months (1937-1949). Louis made 25 successful title defenses, a record that still stands, and his two fights with Max Schmeling carried enormous political symbolism during the rise of Nazi Germany.

Record 49-0 with 43 knockouts, the only heavyweight champion to retire undefeated. Marciano possessed extraordinary punching power and an iron chin; his 1952 comeback victory over Jersey Joe Walcott after a first-round knockdown to claim the world title remains one of boxing's most iconic moments.

Record 32-4-1 with 27 knockouts, Smokin' Joe was the first man to hand Muhammad Ali a professional defeat. His relentless pressure style and devastating left hook made him a nightmare opponent; the Fight of the Century (1971) at Madison Square Garden cemented his place among the all-time greats.

Record 76-5 with 68 knockouts, Big George holds one of the most remarkable careers in boxing history spanning two decades. He won the world heavyweight title in 1973 by demolishing Joe Frazier, lost it to Ali in the Rumble in the Jungle, then staged a legendary comeback to reclaim the belt at age 45 in 1994.

Record 36-3-1 with 25 knockouts, Leonard was a five-weight world champion whose speed, combinations, and ringcraft were unparalleled in the 1980s. His legendary rivalry with Roberto Duran (three bouts) and his stunning upset of Marvin Hagler in 1987 define an era of elite competition at the 147-160 lb classes.

Record 62-3-2 with 52 knockouts, Marvelous Marvin held the undisputed middleweight championship for seven years (1980-1987). His brutal war with Tommy Hearns in 1985 — often called the greatest first round in boxing history — and his technically brilliant defeat of Roberto Duran showcase his complete fighting mastery.

Record 50-0 with 27 knockouts, Money May is the only world champion to retire undefeated across five weight divisions. His technical mastery, defensive genius, and elite conditioning made him virtually untouchable; his 2015 super-fight against Manny Pacquiao shattered all pay-per-view records at the time.

Record 62-8-2 with 39 knockouts, Pac-Man is the only boxer to win world titles in eight different weight divisions. The Filipino southpaw's devastating speed and power overwhelmed champions from flyweight to welterweight, with his 2009 destruction of Miguel Cotto voted Fighter of the Year performance of the decade.

Record 173-19-6 with 108 knockouts, Robinson is widely regarded as the greatest pound-for-pound boxer in history. He won the welterweight title and the middleweight title five times, with his 1951 bout against Jake LaMotta considered one of the finest performances in ring history.

Record 66-3 with 52 knockouts, the Brown Bomber reigned as heavyweight champion for a record 11 years and 8 months (1937-1949). Louis made 25 successful title defenses, a record that still stands, and his two fights with Max Schmeling carried enormous political symbolism during the rise of Nazi Germany.

Record 49-0 with 43 knockouts, the only heavyweight champion to retire undefeated. Marciano possessed extraordinary punching power and an iron chin; his 1952 comeback victory over Jersey Joe Walcott after a first-round knockdown to claim the world title remains one of boxing's most iconic moments.

Record 32-4-1 with 27 knockouts, Smokin' Joe was the first man to hand Muhammad Ali a professional defeat. His relentless pressure style and devastating left hook made him a nightmare opponent; the Fight of the Century (1971) at Madison Square Garden cemented his place among the all-time greats.

Record 76-5 with 68 knockouts, Big George holds one of the most remarkable careers in boxing history spanning two decades. He won the world heavyweight title in 1973 by demolishing Joe Frazier, lost it to Ali in the Rumble in the Jungle, then staged a legendary comeback to reclaim the belt at age 45 in 1994.

Record 36-3-1 with 25 knockouts, Leonard was a five-weight world champion whose speed, combinations, and ringcraft were unparalleled in the 1980s. His legendary rivalry with Roberto Duran (three bouts) and his stunning upset of Marvin Hagler in 1987 define an era of elite competition at the 147-160 lb classes.

Record 62-3-2 with 52 knockouts, Marvelous Marvin held the undisputed middleweight championship for seven years (1980-1987). His brutal war with Tommy Hearns in 1985 — often called the greatest first round in boxing history — and his technically brilliant defeat of Roberto Duran showcase his complete fighting mastery.

Record 50-0 with 27 knockouts, Money May is the only world champion to retire undefeated across five weight divisions. His technical mastery, defensive genius, and elite conditioning made him virtually untouchable; his 2015 super-fight against Manny Pacquiao shattered all pay-per-view records at the time.

Record 62-8-2 with 39 knockouts, Pac-Man is the only boxer to win world titles in eight different weight divisions. The Filipino southpaw's devastating speed and power overwhelmed champions from flyweight to welterweight, with his 2009 destruction of Miguel Cotto voted Fighter of the Year performance of the decade.