sounds like it.williams walked round at 154lb so by the time he'd re-hydrated these days he'd be 10 stone odd and he's rip barerra's head off as you say
Even if you are going strictly by what boxrec said, with any reading at all you would see the disparity in weight... Unless you just looked at the name listing page (where it just has the name and weight and record) without clicking on the name to display the actual record, you would have answered your own question. But to expound: As someone else already posted, Barrera was at his best at 122 and arguably 126. He fought at a high level at 130, but wasn't the fighter he was at the lower weights... He was completely done by 135. Done. Williams, on the other hand, was a monster lighweight who regularly fought and beat (in many cases) welterweights... Need any more explanation?