He doesn't drink alcohol. He will go out to parties and then in the dead of the morning after the party, go out of a 3 mile jog. He's just wired differently. Combined with his boxing IQ and otherworldly technical skills and reflexes, he has that final boss feeling that you get from video games.
I honestly believe that Floyd, givin that he's a little older and his body naturally is a little more bigger and sculpted than it was a few years ago, can sucessfully campaign at both weight classes of 147 & 154 it's just that he has to find the right solid diet, as opposed to the junkfood diet that was for the Cotto fight, to help him prepare and perform well in those fights at the higher weight or weights. For the DeLahoya fight, at 154, in 2007 Mayweather was just moving up in weight basically from 140 to 147, having just fought Gatti, S.Mitchell, Judah, and Baldimour in a time span of just 23-months and moving up a total of 14 pounds also in that time. And for the Cotto fight in 2012, also at 154 and at a weight that Floyd himself insisted on for Miguel to not feel weight drained, Mayweather did fight a very significant fighter in Cotto knowing that he had to serve a two month jail sentence no more than three weeks after the fight took place. Without that black cloud hovering over him and with Floyd being fully acclimated now to the 147lb weight and with absolutely no chance of him ever being able to get back down to 140, no matter what Floyd Sr. says otherwise, he's physically free from those two basic intangibles that were the case for his previous runs at 154 and I believe the next time Floyd does fight at that weight again and it'll be soon he's going to look almost as sharp as he still does at 147. Watch out Canelo!
:happy Awesome! The opponent is very tough but pretty limited, he doesn't have the skills of Floyd Jr.