It's definitely his knee. His batting stance is all sorts of messed up. He used to have his deep crouch with the bat cocked and coming over his head in rhythm, but now he's standing way too straight. Those who think that he looks like Mo Vaughn at the tail end of his career seem to be more right than not.
Lately though he's been coming on really well, he's really fighting through this with infield singles into the shift. He's hitting the ball well when he gets contact, but really, as we saw last year with Beck and Okie, a DL stint is all right if he needs it, and it seems like he might. Has anyone seen his stance in the past three games?