Cesar. Franzke said something a couple of innings ago to the effect that he seemed to be bothered by something, after an AB. I didn't catch it clearly (other things going on here). I would guess that getting him out now is precautionary - particularly if it was something like tweaking an oblique.
If he did have to be DL'ed, it might have to be Valentin at 2B. Mitch Walding is the only infielder on the 40-man who isn't already up - if Kingery isn't the SS, they'd need to clear a 40-man roster spot.