basically was suffering from brain injuries during the fight, which ended up being amplified due to how brutal the fight was (Benn fought dirty imo and had ref home cooking). Gerald ending up not being able to finish/passing out in his corner and the rest is history. He started showing signs after his Julian Jackson bouts. Gerald had a chin of stone.
you have to watch the fight to see what i mean about the mouth piece, his eyes blinking and etc.