I can't see why Arum would make this fight, he's not an idiot. Pac most likely wins, even though Casa beat Katsidis and looked better than against Santa Cruz its clear he's slowed down, and say Pac looks impressive fans would say Casa was shot. No win really.
That being said I'm not sure who Pac goes after past the David Diaz fight. Juan's gotta work his way back up, not sure they really want Nate, Casa doesn't make good sense in a risk/reward type deal. Hatton's looking more and more likely really.
Not like I wouldn't mind seeing it as a fan, just realistically I doubt it happens.
Bookmarks