Mayweather - since castillo 6 out of his 7 opponents had not won all of their last 6 bouts (boxrec)
and none had an undeafeated record

in truth sharmba and gatti were shot fighters ( not that i rate gatti as a gr8 fighter in his prime but i know alot of you do)
Henry Bruseles is well henry bruseles haha
and none of the others are particulary special
and none of them are natruel brawlers
now this is no critisism of mayweather, and i think taking on baldo is the best thing he could of done, but do youu think the castillo fights scared him prehaps, showed him he is not the invincible fighter he thought he was? it just seems to fit imo lol