One of which could be that he knows his injury is far worse than let on and that would explain his emotion following the game. Possibly he knows its surgery in the off season and a long rehab program.
Another could be he was ill and just not feeling right and took himself out of the combat zone.
Another could be there is nothing wrong with him at all and he "just wasn't into it".
Another could be that his knee does hurt -enough to scare him while running and better to have Anderson taking the snaps.
Who knows. Could be no one but #30.
But there is something there. In that light I agree with Rami. Something is clearly not normal. We should know more at the SB and for certain far more after that.