Greatest boxer at destroying careers?

Chavez quicly comes to mind, and even if I didn't read anybody's post's saying the same thing. He put terrible hurt on guys like Taylor, Haugen, Rosario, Camacho, etc., and it probably would have been better for these guys if Chavez had mor of a merciful, one-punch delivery system, like a Bob Foster, than the cruel, debilitating attack that he had.

 

That's an exaggeration.

He was still a very good fighter for a little while, even if not 100%.

 

i don't compare the klitschko to chavez. but the way how they both beat their opponents is disgusting. they really destroy their opponents for 10 rounds and beat the **** out of them. and they all disappear after their fight against the brothers

 

Add Joe Lipsey

 

I think Marciano is up there for a brutal battle of attrition and he did ruin many a career, He set Archie back some with that draining beatdown but Archie went on to fight Ali 8 years later and had a 38-4-2 record after Rocky but was on an almost 50 bout win streak leading to Marciano

 

Tyson and cocaine were not a good mix for the careers of eighties heavies

 

In 71, was Frazier really the same after fighting Ali despite winning?

in 74, was Foreman the same after fighting Ali?

I wouldn't say Ali destroyed their careers, but these 2 guys were never the same again.

 

He did destroy the career and reputation of Sonny Liston. Liston continued fighting but no one wanted any part of him.

Ernie Terrell wasn't the same after the humiliating 15 round decision loss ("What's my name?"). He made a decent career comeback in the 1970's but that was about it.

Old Archie was finished off by a young Cassius. Now Moore was ancient but he was good enough to have gone to a disputed draw with future LHW champ Willie Pastrano just months before that bout.