Teixeira -- a key component in the Yankees' post-season hopes -- was deemed unavailable for 10-14 days after a magnetic resonance imaging examination revealed a Grade 1 left calf strain.
The slugging infielder had missed 10 games with the calf strain before returning to the lineup Saturday against the Baltimore Orioles. He aggravated the injury during the game when he tried to beat out a double-play grounder in the ninth inning.
On the play, Teixeira made a head-first slide into first base and was called out to end the game. Replays, however, clearly showed he was safe, which would have allowed New York to tie the contest.
Teixeira has belted with 23 homers and 81 runs batted over 120 games this season.