There is a strong chance the Yankees will play the most important 22 games of the season without Mark Teixeira.

Yesterday, the AL East leaders announced the results of an MRI taken on the switch-hitting first baseman's left calf and the news was bad.

Teixeira — who missed 10 games from Aug. 28 through Friday, returned Saturday in Baltimore when he re-injured the leg and sat out Sunday's win — has an irritation of a Grade 1 left calf strain.

Examined yesterday by club physician Chris Ahmad, Teixeira will be out 10 to 14 days.

Considering Teixeira admitted Sunday he wasn't ready to return Saturday after missing 10 games, the latest setback could sideline him longer than 14 days.