No he wasn't breh. He fought Casamoyer 3 times, went 1-2 against him, and was defeated in 6 rounds in their very 1st matchup...only 18 months after fighting Floyd and was on a 4 win streak all via KO.
He fought Casamoyer twice before fighting JLC though. And that wasn't his downfall imo (even though the wars was part of it). It was also the fact he became too big for the division he fought in and had a hard time making the weight, but more importantly look at who he fought after the JLC fights. Another loss to Casamoyer (who had already beaten him previously and only when Corrales took Casamoyer's trainer for the rematch, he got the SD win over him) and then jumped 2 divisions to fight a Prime Joshua Clottey who was much too big & strong for him. He was gonna lose those fights regardless.
Paul Williams was nothing like Tommy Hearns and didn't want to be. He didnt have Hitman's amateur pedigree, power & pure boxing ability, nor Emmanuel Steward in his corner or in the gym with him. He was there to bang away and overwhelm you with his punches and chin. Paul Williams was the prototype "Mexican Style" fighter for a lack of better words. They could've called him Pablo Guillermo and billed him from Cozumel, Mexico...and he could've fit right in with the rest of em.
Floyd has only had trouble with fighters who pressured him (Maidana, JLC, DLH), Pablo Guillermo's pressure he applied was far greater than all 3 of em, because that's how he fought everytime out and unlike Maidana...he didn't get tired. He would've been in Floyd's face all night.
I never could see Floyd beating someone who was 5 inches taller, with 9'' longer arms, who would throw 80, 90, 100 punches a round non-stop for 12 rounds with a chin that nobody at Welterweight could crack. Not even Margs with "concrete" in his gloves could do it....and there's a reason why Floyd never fought him even though Pablo Guillermo called him out
Corrales wouldn't ever beat P Dubb either.