I say Mosley goes in as the underdog and KO's Floyd, but of course it depends which Mosley shows up.

If Floyd runs and Shane sits back on the end of a jab all night he loses the decision. If Shane gets close enough for long enough Floyd get stopped. The only person with comparable speed and size PBF has faced is Zab. I don't think Floyd's right hand will earn enough respect from Shane to win him the fight.