Stewart (foot) is out of the lineup Sunday against the Cardinals. The Pittsburgh Post-Gazette's Bill Brink notes that he will be available off the bench, however.
Stewart was an early exit Saturday after a seventh-inning collision resulted in a foot injury. The ailment will extend his absence to Sunday afternoon, giving way to Erik Kratz to get the start behind the plate. With Francisco Cervelli (hand) now on the disabled list, this is a tough break for Pittsburgh, who may have to rely on Kratz multiple times this week if Stewart continues to sit.