Baltimore, MD (Sports Network) - New York Yankees first baseman Mark Teixeira could be sidelined for another week after aggravating a calf injury during Saturday's game against Baltimore.

Teixeira returned to the lineup Saturday after a 10-game absence because of a strained calf, then hurt himself again trying to beat out a double-play grounder in the ninth inning of the 5-4 loss. He made a head-first slide on the play and was called out, ending the game, although replays clearly showed he was safe. A run would have scored to tie the game.

Yankees manager Joe Girardi updated Teixeira's status on Sunday and said an MRI exam would be scheduled. The switch-hitter will likely miss New York's upcoming series in Boston.

Teixeira is hitting .255 in 120 games with 23 homers and 81 runs batted in this season.