It really doesn't. That has the potential of ending prematurely and being a No Contest.
Because, of that risk people shouldn't pay for that fight. And, besides maybe Jones-Bailey their undercard is weak.
Bradley looks like a Klingon Warrior with that dome of his. I like Bradley too, but I would bet my account that Pac will get cut from a headbutt during the fight at some point.
Can anyone imagine if Bradley was beating Pac like 4-2 in rounds and the fight ended on an accidental headbutt, giving Bradley the W. My god, this place would turn upside down.