Rocky Marciano he had an undefeated career with 49 wins, 43 knockouts, and no losses.
He's the greatest heavyweight of all time, but the greatest of them all was Sugar Ray Robinson.
Fedor Emelianenko
the greatest fighter of all time was Huo Yuanjia. Huo Yuanjia became a hero to the Chinese people after defeating every one who challenged him and was never defeated.
Considered by most the greatest heavyweight champion of all time, and a top 5 greatest boxer ever.
Marciano is the only heavyweight champion to retire with an undefeated record, though he is often omitted from the lists of the greatest of all time due to the realitivly low level of competition in the heavyweight division at that time...
The Fighting Marine Gene Tunney, considered the greatest light heavyweight of all time my many fans and experts alike.
u can say that but he is actually based on muhammad ali greatest fighter of all time!! :)
My 2 cents, ALI.
Muhammad Ali, nicknamed “The Greatest”, is regarded as one of the most significant sports figures of the 20th century and is often regarded as the greatest heavyweight boxer of all time.
It all matters who you like there is no really good boxer
John L Sullivan
Mike Tyson