It's hard to get footage of Shumenov, thats my problem. Shane Mosley has never been knocked out so that is pretty good I have to disagree on that. People are going way over the top about that knockdown. A guy that fights like Gamboa is prone to being off balance and getting knocked down. Naseem Hamed was the same, doesn't mean they are always hurt or have a bad chin. He might get knocked out eventually, but he'll achieve plenty too I reckon. His physical gifts and offense are too amazing for him to fail completely.