He faded in the late rounds against Oscar. This leads me to believe that he would give Shane trouble in the early rounds with his good jab, but shane would take over late and win a UD.
How about Mosley vs the real Ike WILLIAMS at 135lbs? Mosley is prone to getting hit with right hands, Ike Williams has the best right hand at lightweight, probably of all times.
Prime Mosley would beat Ikes ass at welterweight... despite the jab. too much speed and combination punching
Quartey would likely take the play away from Mosley for long spells with his jab en route to winning a decision. It'd be a hell of an action fight for portions, though. Ike wasn't a great defensive fighter or anything.