As a Hog fan, I assure you he has always been described as "A Beast". He only has one speed and that is full out, so, your concurs about durability are valid. He was injured several times while at Arkansas due to fighting for extra yards and/or not wanting to go down. But, he wouldn't be such a beast if he didn't play like that each snap. All you can do is enjoy the show and hope for the best.