TORONTO - Mark Teixeira said the lat issue that kept Joe Girardi from inserting him into Monday's game as a late-inning defensive replacement was not serious. "It's fine," Teixeira said before starting Tuesday night's game at first base.

Teixeira looked healthy in the fifth inning last night when he hit a two-run homer to right-center, his 10th of the season.

Girardi said Teixeira's back muscle bothered him "the last couple of days" in Boston, "and it might have been even a little bit before that.

"He's better today. He's been able to manage it. You give him a day off to get it calmed down, get it healed."

Two of Toronto's three runs in the eighth inning of its 3-1 win Monday scored when first baseman Garrett Jones failed to come up with a Chase Headley short-hop throw.

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Pirela to be called up

Jose Pirela, 11-for-19 in four games since joining Scranton Thursday on rehab assignment, is slated to be activated Wednesday. Gregorio Petit, who started at third base Tuesday night, is likely to be sent down.

Pirela hit .370 with a .433 OBP in 15 games in spring training before suffering a concussion March 22. His best position is second base, but Girardi said he's not necessarily being activated to take time away from Stephen Drew, who was hitting .149 with a .235 OBP.

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Headley, who played in all of the Yankees' first 26 games, did not start Tuesday night. "I just felt he needed a day today," Girardi said . . . Aaron Judge, 23, is tearing it up for Double-A Trenton. The 6-7, 275-pounder had a recent 10-for-20 surge and hit a two-run homer last night to put him at .333 with five homers and 14 RBIs.