One thing I'll give Oscar credit for is that no one, I don't care what great fighter it is, would have an easy time beating him. They may win convicingly, but it would by no means be a breeze. Even though Hopkins KOd him and was clearly winning the fight up to that point, I'm sure even Bernard would say Oscar was far from his easiest win. I think Oscar's too talented to get blown out by anyone, however McCallum would still win, probably in similar fashion to Bernard.