'OZ' Actor Craig 'muMs' Grant ... Is a UFC Fighter?

Here's a fuzzy 45-year-old Craig "muMs" Grant who is best known for playing the well groomed Arnold "Poet" Jackson on the HBO series "Oz" (left) -- and 39-year-old UFC fighter and backyard brawler Kimbo Slice with his signature badass beard (right).

Only one of them could survive in real prison.

We're just sayin'.