According to his bio, he employs a fighting style known as "the bullrush", where he basically runs at you swinging and kicking. He could probably scare a rhinoceros half to death with that schit and win by default.
The guy who beat him is a 6'3" 230 lb. Brazilian Ju Jitso dude, so he most likely got ahold of an arm, put a submission hold on and big-boy tapped out as fast as he could get the other hand to the canvas.