I think it's highly unlikely he used them for the first time against Mosley, just doesn't make much sense to me. However, his decline after that fight is hardly evidence of this. He was a guy who was never built to last, a pressure fighter who relied so much on his chin and conditioning, and Mosley beat the living shit out of him. Bottom line is we'll probably never know, but the fact that he even attempted to use them the one time makes him a complete piece of shit regardless.