Cain might beat Carwin using his wrestling but Lesnar will eat him alive. Faster, stronger, hits harderd, and has much better wrestling. It's just not a good fight for Cain. Not at all.
Carwin is most likely a loss for Cain as well. Cain hasn't showed much ability to really hurt his opponents. Tonight he landed big shots but did very little damage with them against Rothwell. Carwin only needs one shot and every round starts standing.
That is not dead which can eternal lie and withs strange aeons even death may die.