As an amateur fighter myself, I can tell you that large shoulders and chest can be an extreme disadvantage. I am not saying that strength plays against you by any means, but reading a fighters frame of that magnitude would be fairly easy even if it comes at you like lightning. Being larger also makes it hard to exhale while punching and inhale to take a punch without gassing out your muscles and heart. I think he is a tremendous athlete, but i predict he will battle himself more then his opponent.