In general I've heard some questions about his ability to be a LT, supposedly he's inconsistent while handling the speed rushers which kind of reminds me of the knock on Backus.
I've also read that he does a good job of being able to get low and take on bigger D-Lineman and athletic enough to pull/get to the 2nd level. His size and strenghts/weaknesses reminds me of other good LGs, namely Steinbach and Kris Dielman, not to say that Saffold is guaranteed to be on that level because he is not.
Jerry kind of concerns me with his weight, but when he's motivated he seems like he can really play up. Kind of sounds like a young versoin of Damien Woody, but he seems to have good potential.