Mayweather's 19 yrs v Marciano's 8 (at Hw)

[Joeyzagz]

Which 49-0 was harder?

Or does Calzaghe's 15 years without a vacation crush both?

[Tony Trick-Pony]

I will watch Marciano's old fights anytime. Real excitement.

Mayweather's fight films will collect dust. Couldn't even sit through the Fight of the Century.

[////]

This shows why undefeated records suck

Mayweather Rocky and Calz all benefited from declining opponents just to get a name on their record

Rocky will be remembered more than the other 2 because of his style though... And the movies using his name

[The Problem Child]

Marciano's resume is far superior, so is Calzaghe's. Floyd NEVER fought at top name in their prime, simple as that.

[AddiX]

Calzaghe is the biggest underachiever in the history of the sport IMO.

Can't compare Floyd and Rock, completly different time periods, completely different sports, rules, styles. Just impossible to compare.