Who would make good sparring partners for Floyd and Manny, to prepare for their fight? Pacquiao should spar with Broner, since he's pretty much a clone of Floyd.
Could you imagine khan going off on twitter "Today I got the best of floyd" "ask anyone I knocked him down 8 times"
Zab would be good for Mayweather. He isn't as quick as Pac but his length should make up for the lack of speed.
For Pac - Broner, Bradley, Crawford, JMM For Mayweather - I think it is really tricky. Definitely get advice from JMM but no boxer comes to mind that does that bounce in and out thing and is a Southpaw. Maybe Zab. This has nothing to do with this post but Khan is an idiot.