As quick as Mosley has 'returned' from the drudges of boxing he would spiral back after a match-up with Mayweather. PBF is a defender on par with Winky Wright and you can clearly see the frustration in the middle rounds and how Mosley gives up with his body language in both losses to Wright.

Zab Judah was faster than Mayweather too. Where did that lead him? Mosley is frustratable if he can't get an expected result. I saw PBF in person weighing around 150 and he looks very natural there. Mayweather will remind Mosley how old he really is.