I would have to say that the person who had the best chin of all time would have to be Jake Kilrain. He went 75 rounds with John L. Sullvan in 1889. The one with the second best would have to be Jess Willard. When he fought Jack Dempsey during 1919, in just the first round, he broke his nose, shattered his cheekbones, broke his jaw, broke most of his ribs, lost partial hearing in one ear, and lost six teeth. He still was tough enough to go 2 more rounds with the hard punching Jack Dempsey.
George Chuvalo is quite a fighter. Yeah he is tough, but I just think that there is tougher, like Jake Kilraine and Jess Willard. Chuvalo has not gone through that kind of punishment. Nearly got his eye torn out by Frazier.
