Injury. Leg I believe. He's day to day.
This in Gonzalezbizzaro World
is known as the beginning of vacation.
I've been something of a student of his career ever since he landed with a thud in Detroit a few years ago. When he starts slumping or getting booed (as is the case in KC now) he inevitably succumbs to a series of small ailments which keep him out for a week or so. This all leads up to a major leg or back injury that no doctor can diagnose (see Texas 2003). Then he'll ask to go home to rehab.
I hate to be a cynic, but this pattern repeats itself every year.