i think that mayweather cant stays as a welterweight right now cause its 2many threats from every where in the welterweight division right now. I'm not gonna say Margarito Or Cintron has anything but a punchers chance they cant catch him. Paul Williams is 6'1 his punches are not accurate but if you cant stay inside and take him out his constant pressure with that long reach thats where i say mayweather would have serious problems. The only reason you could try to right him off cause he hasn't faught many big names but margarito big as hell i understand why he didn't knock him out. Cotto will Handle Mayweather cause he has constanst pressure he sticks to his game and remains calm.