I am taking Tommy. Danzig has the experience no doubt but he had to move up a weight class to fight at WW. Meanwhile Tommy is obviously a beast at 170. He has manhandled his opponents like Fitch does and judging from his last TUF fight he is learning how to strike aggresively like Lawler. I think Tommy wins either by G-n-P cut on Danzig or grinding out a decision because Danzig can't get his back off the mat and is too weak to put Tommy in a submission. Mack will have to KO him standing or daze him standing and slap on a rear naked choke.