I think it really depends on how much time he has left in the sport. He is carrying alot of muscle on his frame, which makes it injury prone, and he will be 38 in July so he is nearing the end of his prime anyway. The biggest factor is that he has a very lucrative job waiting for him behind the scenes when he is ready to give up performing, so he doesn't have to keep wrestling forever just to pay his bills, like Ric Flair.