I've never talked about headbutts this much in my life.

But look at the replay starting at 2:56, Mayol is leaned down throwing a right hand to the body and right after he starts that Sosa jumps in a little bit, if he doesn't do that I don't see how there would be a butt. I've heard there were other butts in the first round so maybe he was trying to but I don't see how you can tell just from that one that it was intentional.

Thinking about it though Mayol does have a habit of leading with his head.

Obviously bad luck for Sosa though.