IMO, JDS vs Carwin will be more interesting. With Carwin more willing to stand and bang with JDS than Lesnar would have. Though, like people have said, if Carwin's stone fists even only flicks the chin of JDS, it could be trouble. In JDS's previous fight against Nelson, JDS did take a few shots, granted he did give a lot to Nelson. Carwin has poor cardio imo, his fight against Brock, he was gassing within 2nd round, but that may be due to him striking the shit out of Brock. I think JDS should turn the heat up on Carwin and try to gas him. JDS will look to body shot and counter punch with his speed and accuracy.
JDS via TKO 1st/2nd round.