AT HIS VERY VERY BEST Rocky Marciano would never ever get the Least bit tired and would actually on the contrary become stronger and stronger as the fight went on---do you know any fighters who were like that? Frazier tired, Ali tired, Lewis really tired, Tyson tired, Bowe and Holyfield turned to sluggish lumbering clinchers, Shavers couldnt keep his hands up--- etc... I think Larry Holmes woulda given Marciano the most trouble, if anybody could OUTLAST this guy. Who could outlast Marciano? He was a frikkin steeamroller, steamin over all the people, this guy threw 100+ punches per round, like a frikkin windmill. TELL ME WHO COULD STAND UP TO THAT