Sam Soliman doens't have Mayweather's stamina IMO he didn't throw hard punches at all against Winky... He was just throwing punches for pressure not even trying to make an effort on landing them... Mayweather has never really been tired in a fight even when he has been pressured for the whole fight, and is weight drained like against Chavez. Nobody trains harder or is in better shape than Floyd... don't go by his punch numbers because thats NOT HIS STYLE to throw a 100+ punches a round, but he could easily for over 12 rounds... Look at what he does in training camp and the only people who come remotely close IMO are Castillo, Corrales, and maybe Calzaghe who could all throw over 1000 punches HARD.