meh, he isn't fat. he doesn't come into his fights with flab on his body, he's in shape and he fights like he's in shape.
i honestly believe he misses weight intentionally. he's willing to drop a few pounds, but not enough to compromise his performance, and he just chooses not to do it because let's face it, there's no real consequences for it. he loses a % of his purse, so what. he's still fresh, heavier, and wins by KO. they strip him of his title and he wins it back in his next fight.
