Sometimes, a fighter can lose his ability to take a punch, whether due to being in a war, getting knocked out, or just getting old. What were some such fighters?
I would say Manny Pacquiao. KO'd early in his career, but rebounded and had an iron chin going all the way up until 2012. But since KTFO6, no one has hurt or dropped him or come close to stopping him, so maybe it's not cracked? Lucas gone test that chin, doe.
My boy Gabe Rosado. To my eyes, he doesn't take the punches as good as before. Highlighted by the fact that relatively light hitting Guiterez put him down. Lemmy was just too much for Rosado.
I wouldn't be surprised. But going back to my point, isn't it weird that no one has been able to drop, stun, or hurt Pacquiao since KTFO6? Pacquiao took flush right hands from Rios, Vargas, and a massive Horn. Remember, these guys were around 160+ and Pacquiao was under 150.
I think Vargas, Horn and Bradley got some good shots in there. But those are the "Okay, i felt that" kind of shots. You feel pain but you are fine. (I dont know how to quite explain it). Shots that get your respect and shots you dont really want to take again.