Certain boxers have a great style suited for MMA and DAVID TUA is one of them. I watch UFC, although I find it boring, if Tim Slyvia could hold the belt, then just about any average boxer who learns take down defence could be champ.
I believe most heavyweights will fear going for him because of his punches. He's quite big and strong physically anyway, but his punches have serious power behind them.
He will be able to KO most guys and will dominate stand up ofcourse. Whether he can learn how to avoid a take down and kicks, I'm not sure.
Fedor is an exception but I defenitaly think he has a punchers chance, same thing with Brock Lesnar, I don't think Lesnar has been hit YET, because he's so strong he just overpowers guys like he did Mir