BJJ black belt practitioner`s are pretty good, but what about black belts in other martial arts? Could a Shotokan black belt beat a mid level MMA fighter in the octagon?
As you should well know by now, strikers have big problems when they get taken down. The MMA guy will likely see that the other guy has good stand up and take it to the floor right away. If he's got an ego and wants to keep it standing, then, yeah, he could lose.