Once Broner gets smashed a few more times he will be so depressed that he will balloon up to 250 pounds after the fight.
Pac put on about 5-6 lbs naturally over the years from when he was at FW. He went from being a monstrous FW, to a huge SFW, to a good sized LW, to an average LWW, to a small WW. Its really that simple. When he was an 130, he was essentially like JCC jnr at 160. Guererro was at 126 well into his 20s too, and is now a small WW, like Manny