Who do you have? I'm going with Mayweather via decision.
Mosley is probably the stronger fighter but Mayweather is extrememly fast, technical, and is a smart boxer. He's said to have a pretty strong chin but it hasnt been shown because he's so elusive and defensive. Mayweather will tag and move on his way to a UD.
Maybe after Mayweather win, Pacquiao can agree to a drug test and he can fight Mayweather. I mean if Mosley, an ex steroid user can take a drug test why cant Pacquiao?
Again. Mayweather by decision