Who do you think had the best chin in boxing, past or current, it doesn't matter the era? I would have to nominate Muhammad Ali personally. Heaviest division, never been knocked out. Career spanned from 1960 to 1981 (minus his suspension). Norton, Frazier, Liston, Foreman......goodness gracious that man could take a punch. I remember watching clips of Frazier leaping into that left hook, bam!! Even when he knocked Ali down, he sprang back up. Watching the shots he took, so flush even, asking myself how is he still standing? Who would you nominate as having the most impressive chin in boxing of any era? Thoughts?