Surprise: Miller
Disappointment: McKelvin
Based on reports and watching him maul D linemen in the first preseason game, I'm very surprised by just how good he's looked. It started in OTA's with him knowing the blocking schemes as well as anyone, and has continued with him backing that up with his play.
I say McKelvin is the biggest disappointment because I was really hoping that he was going to be healthy, and then came the setback. In Rex's D, he would shine IMO. Not his fault, still disappointing either way.