My money's on the gorilla.
I've watched enough nature shows to know that the gorilla could swat a few guys down just by waving his arm at them and catching them in the side of the head. Factor in claws, teeth and sheer strength, I don't think the football guys have much of a chance. And I honestly don't think many would have the balls to try once they were in front of the gorilla, even if they agreed to the fight beforehand.