May 05, 2009 10:16 AM EST

Yankees catcher Jorge Posada left in the eighth inning of Monday night's loss to the Red Sox with a hamstring injury.

Hideki Matsui pitch-hit for Posada, who was playing as New York's designated hitter, after he came up lame on the bases earlier in the game.

Posada with 2-for-2 with a walk in the 6-4 loss, and is scheduled to have an MRI on Tuesday.

Via New York Post