He was a decent boxer-puncher with a bit of lax defense and average durability. He wouldn't have been at the top level without his massive punch. That's fine because a lot of guys wouldn't be at the top level without a specific attribute, but he'd lose to a lot of guys if he couldn't find that massive KO punch. Against a very good defensive fighter with an excellent chin like Canelo, I think he'd be in trouble (still very dangerous, though). He could be definitely be outboxed, as we saw where he was getting beaten around the ring against Herol Graham before KOing him unexpectedly.