That's why I don't believe the human growth hormone story. Look at the guy's size, not much growing going on there :bart
Seriously, Headbutting is not boxing so the question should be "who is the worst head butter of all time". Shout out to Victor Ortiz who blatantly tried to headbutt Floyd and then got what was coming to him, a KO when he didn't leave himself protected at all times :yep What would be the next questions on this list? Who is the best at low blows? (ok it's Golota) Who's the best bitter? (ask Holyfield) Who's the best at faking a low blow? (too many to pick) Who's the best rabbit puncher? (Samuel Peter or maybe there's someone else y'all can think of :think) :rofl
If Evan Field had a neck five inches longer, he would have stopped Lewis. And hurt Valuev. But right now, i'd say the master headbutter is Bradley. He's not so subtle, though.
Mayweather is way better in this than Broner, he's up there with Hopkins. If by better we mean circus teathre, that is.