Who are the Greatest Fighters of All Time that were packing a "Glass Chin"?

[FromBA]

Tommy Hearns had a weak chin. If he had had more punch resistance, he would have beaten Leonard in their first fight imo.

[MASTERBX]

Manny has a glass chin, but he's not GREAT fighter.

[Left Hook Tua]

floyd patterson. he was also a tiny HW, which didn't help.

they were all mostly his size early in his career. floyd wasn't small for the 50's era. 6 ft 185 or so.

halfway thru his career the modern heavies came though.

modern heavyweight era started with liston after floyd. 6 ft. 200 lb plus became norm.

liston is the 1st modern heavyweight champion, ali its 1st great modern heavyweight champion.

bowe, lewis for super heavies, 6'5 240 lb. guys