Sure Floyd can make Super Lightweight. So , lets do it and have Floyd-Manny at 140 for a potential and highly likely classic show down .
Mayweather could make 135 with 3 weeks of training. Did you guys forget that he started his career as a super feather and that he showed up to the Oscar fight at 150 lbs - maintaning his weight is as easy as it is for Ricky Hatton to gain weight. Pacquiao vs Mayweather at 140 - DREAM FIGHT!
I don't think Mayweather would fight well at 140 now. He filled out a lot in 2006-07. After that happens, to go back down would be a mistake.