What major boxer had the worst chin ever

[Bookkeeper]

Out of all the mainstream boxers (not journeymen) who had the worst chin ever (made of glass). My picks would have to be Terry Norris, Zab Judah, Tommy Hearns, etc etc.

michael grant (he was somewhat of a name in the heavyweight divison, several years back)

I forget all about Jello Legs Grant, I think one time his legs were so unstable that he broke his ankle (against Lewis) or something like that.