Actually, probably the best game for MMA right now is Pride FC on PS2. Their single player sucks, but the actual gameplay and create-a-fighter is the deepest I've seen. If you don't have it, find it. You won't be disappointed.
It doesn't matter if you agree or disagree
... As long as I don't bore you and I spark a moment of thought, my goal is achieved
Queng leon queng tigre ecu tacacut, queca pa? - Pampangan Mandarigma Motto