Floyd Mayweather should Retire after Cotto

[DIEGO DA HITMAN]

yes, he fought guys in his own weight class

Mayweather has titles in 5 weight classes. He's fought guys naturally bigger than him throughout the 2nd half of his career. So, I don't think that argument holds any weight.

[PeROxiDE]

Floyd mayweather should dominate the welterweight division, unify the titles, break Marciano's record, then retire as the greatest of all time.

What Marciano record would that be? I do hope you are not reffering to his undefeated heavyweight record, anyone with half a brain cell knows that people at lower weights have assembled more impressive undefeated records, but being as heavyweight is* boxings blue riband division, only his record really gets mentioned.

*WAS