I hadn't heard anything too awful about Lane Taylor so for now I will just assume that he's expected back soon. I agree though that O-Line depth once again is pretty shaky on this team. I think Kyle Murphy can be an adequate backup on the right side, but at LT he'd need a lot of help as he is pretty overmatched there.
I had heard a couple of weeks ago from some talking head on the radio that when they watched Spriggs during camp, it looked like he was protecting the leg that was injured last year, almost like he just was dragging the leg instead of using it normally. He was already a guy who was shaky even when healthy, that injury may have made things even tougher for him going forward.