Sal took Little Red's best shots, and the expression on his face did not look like a kid in the ring with arguably the hardest banging 126 pounder ever. Hell no! He looked like a guy ordering a freaking pizza! Simply amazing.
Chuvalo was a top ten HW for over 15 years, fought pretty much everybody, but was never down. I think Mugabi's chin was made out of some kind of illegal alien **** from outerspace.
doug dewit was able to take some thunderous shots early in his career....his resistance waned somewhat later on tho
chavez, duran, matthew saad muhammad, ali, jake lamotta, ray leonard, marvin hagler. Those are some of the fighters with tested and proven chins.