Some one mention this on another thread and I had been in the same though process.

Pac had alot of trouble with marquez because he likes to shoot down the middle as well as counter punch, guys who hook primarily DLH, Hatton, Cotto got eaten up. Cotto was snapping Pac's head back pretty good with the Jab and right when he through it...

Floyd has that dynamite straight right he lands which will find the home against the southpaw Pac, as well as the body jab which will upset Pac's rythm and setup the pretty boy nicely.. I think Pac will get the occasional punch for the early rounds and be the aggressor, but as usual Floyd will make the adjustments and start Carving Pac upslowly and methodically until he is there for the taking.