Well let's face it, Henry used his head to almost gas out Mack. I mean, one arm aside, Mack delivered a ton of shots from his power hand directly to that cement pumpkin otherwise known as Henry's head and in particular that one round that would likely have levelled a buick, but yet, Henry then went on to start winning rounds. Mack showed grit and pulled it out in the late rounds by coming back on, but not before looking in trouble, fighting with his mouth open. But Mack earned the win deservedly.

So, yea, I think the deal is to outbox Henry, and wisely. And don't count on finishing him off with that obv. opening his has for the overhand right. I don't know enough about George to know what he brings. But also, in retrospect, and after Macks last fight and his effectiveness with the left hook that was missing against Henry, it would have been a different fight for Mack had he had it.

Cliff notes : Don't try to KO Henry. Outbox him.