"Upton said after the game it was "not bad at all" and it was "definitely a possibility" he could play Saturday. Maddon said he isn't likely to start Upton, but he could be used later in the game. He felt it on his first at-bat when he stumbled a bit getting out of the box, and when it didn't go away the trainers, concerned initially it could be a hamstring issue, decided he should come out for precautionary reasons.

UPDATE, 8:29: Upton left the game with tightness in his left gluteal, which are the muscles in the buttocks.

DEVELOPING: CF B.J. Upton left Friday's game after the second inning.

Upton was replaced in centerfield in the third by Justin Ruggiano, who was just called up earlier in the day.

Upton grounded out to the mound in his first at-bat, making the final out of the first. He made a nice running catch in deep center during the bottom of the second.

No word from the Rays yet on why he left the game."