One of the main issues is that it's easier to put a few pounds on than take them off. That's why I didn't really have a problem with the JMM/PBF fight because it was one guy coming up 8lbs, the other guy coming down 4lbs, which seemed fairer. However, Pac has shown he can fight at a 147 limit, so he SHOULD fight there, it's not like he's coming up from 135, he's THE man at 140 & if that's his limit than he should stay there, not drain natural welters.