[R_9-Ronaldo]

He is the only one to retire undefeated. In the 50's boxing was alot easier and much less competition then. But in Ali's time there it was much harder and there much better boxers than in Rocky's time, Ie. 6/top10 in history were in Ali's time, And for him to only lose once to a drugged-up Joe Frazier probably makes him better. But why I pick Tyson is not because he never lost but because in his early years he had the best KO-Win ratio. 35/35 games won, 32 by Ko , 28 KO by the fifth round, 17 KO in the first round alone. Thats the best KO ratio in the history of boxing as a whole, And he never lost under the manager Cozdamato and Rooney and as soon as they died he starting losing, And becoming a party-obsessed, Vicious, And unrespectful prune. And that was mainly because Don King F***ed Tyson for all of his money and fed him just a bunch of lies