Shane Mosley is a very good body puncher, and he will have some success to the body. But Shane Mosley as JT said can get outboxed, and often loses concentration. And that was evident in the fights JT mentioned, and also in the 2nd fight with ODLH.

I really like Shane Mosley and IMO he's one of the best Lightweights of all time, but he's never been a pure boxer despite his speed and ETC, he's always been more a boxer/puncher, and i just think Floyd Mayweather Jr's better technical skills will be the difference.

Floyd Mayweather by UD 7 rounds to 5.