Griffin has a chin that seems to be built of steel, as most of you know who have seen him fight.
That alone always gives him an excellent chance......
I'm not convinced on his chin. He's been knocked out before (Jeremy Horn) and has been knocked on his ass and rocked good on more than one occasion (Rashad Evans, Rampage Jackson, Keith Jardine).
I think a big part of why Forrest is deemed to have that good chin has to do with his technical boxing. It's the shots that you don't see coming that cause the knockouts and Forrest keeps a great base and doesn't take many chances standing. He does not go for the knockout blow and can watch his opponent better and not get clipped.
In other words, I don't feel Forrest's chin belongs in the same conversation with Dan Henderson, BJ Penn, Rampage Jackson, etc etc.