Pac failed to make weight once from what I recall and he used to rehydrate quite a lot at the lower weights. Bradley is a small JWW and fitness freak. Hopkins was re-hydrating a lot at MW you imply that he is not a pro???
Chavez definitely uses diuretics and other illegal crap. Seriously, he's busted on a DUI one week, and losing a ton of weight and then putting on 20 pounds, Please, a yougn guy like that has no business having to cut all of that weight. He isn't very good either since he was fighting a human punching bag in Rubio. Anyone with speed and movement is going to kill Chavez. Put him in against Martinez, Bute, Froch, Kessler and see what happens. He sure doesn't want to step up to the next weight because he knows what will happen. Martinez will klll him once they fight.
In the fight with Manfredo, Chavez gained 19 pounds over night and Manfredo gained 18 ... Chavez came in 179 and Manfredo 178