I was just thinking about it, and found it kind of funny that many fighters with beards actually have bad chins. Here are a couple of prime examples:
1) Andrei Arlovski-
Granted, the shots he's been put down with were hard shots (the haymaker from Datsik, the 1-2 from Rizzo, the right uppercut from Sylvia in their 2'nd fight, Fedor's blistering OHR, etc), but still, he's been put out, and I would say that his chin is supbar for an elite fighter.
2) Folk Hero/ Mexican legend, Olaf Alfonso
His chin may be made of glass, but he's super exciting, and has mixed it up with some tough guys (Gil Melendez, Sakurai, Razor Rob).
3) (The original) Huntington beach bad boy-
His poor chin nowadays can be attributed to age, bad contitioning, etc, but he's been put down by shots multiple times from good strikers (Belfort, Maurice, Cabbage, Buentello, hell- even Kimbo).
With that, there's a nice segue into this bearded Glass Chin.
Again, to be fair, his TKO loss to Seth was a short notice fight against a fighter with much more experience than Kimbo, as well as being a much higher caliber of fighter than what Slice had been used to facing. However, he was dropped a few times in his backyard brawls, and the crane style jab that put him out was one of the most anticlimatic i've ever seen.
BTW, not really a serious post, just an observation of mine. Any other bearded fighters with sketchy chins?