Look at what happened to Guerrero today, the man's punch resistance is completely shot. He was getting rag dolled by a guy with 4 KO's. Thurman messed Guerrero up badly, his body was still soft and swollen from that beating. Now imagine getting hit with bricks instead of natural power. We must all respect and commend Cotto for still fighting on and being in the elite level after getting cheated by a coward.
Mayweather didn't come close to hurting Guerrero. Guerrero was an iron chinned warrior before he met Thurman and now he's getting rag dolled by gatekeepers with 4 ko's.
Kamegai couldn't punch his way out of a paper bag although that was a brutal fight. Extremely brutal. Thurman's power is what ruined Guerrero.
It's pretty clear that Thurman's chunky hayemakers did Guerrero in. The man is a legit power puncher for a reason. Guerrero was clearly softened up by Thurman, are you really trying to deny this? Lol, man I'm so high I just noticed this guy literally wrote the same thing three times in a row.
Robert was a "Ghost" (Get it?) after Kamegai steamrolled him. I've never even heard of this Thurman fella.
Berto, Kamegai, and Thurman were all high punishment fights plus Aydin and Mayweather fights saw Guerrero getting punched in the face quite a good bit. That's five straight fights of taking noticeable punishment since jumping up two divisions after having already moved up a couple during his career before the jump to WW. Certainly seems like it's over for him as a serious contender. Still a great opponent for an on-the-way-up sort of fighter to face. That's probably what he will be now.