Why was this dumb thread rebumped? I hate JMM but the guy is a legend who knocked pac out viciously... It is what it is.
Beat two ATG's in or close to their prime, Pacquiao and Barrera. Has plenty more accomplishments, but that's all that needs to be said about why he's considered great.
wow Mar*****s are funny, we all know his career is completely irrelevant, aside from his 4th time lucky attempt at Pac, he literally has nothing. He was given a gift against a fighter Pacquaio ruined in Barerra when he didn't even beat him and was in cuckooland in the 7th, Casamayor was like 50 years old and Casamayor was winning the fight until Marquez illegal hip toss. Chris john humiliated him and even Tim Bradley smashed a roided version of Juan Mar*****z, look at his resume, a few questionable wins here and there and some lousy fights doesn't equal a great fighter. He has to be one of the most overrated boxers of recent times.