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Mark Teixeira got seven at-bats and played one inning at first base in a simulated game in Florida on Thursday, a rehab outing that Yankees Senior Vice President of Baseball Operations Mark Newman characterized as a success.

“He looked good, he ran about 75 to 80 percent,” said Newman, who watched the workout. “He swung the bat well, and hit some line drives.’’

Manager Joe Girardi was unsure if Teixeira’s next simulated game would come Friday or Saturday, but did say that how well the first baseman runs in that outing will determine his future status.

“To me the biggest test is running the bases. That’s the biggest test for me, because I think he can protect it a little bit in the field if he has to,” Girardi said. Teixeira missed 10 games after originally straining his calf on August 27, and has been out of action for three weeks since aggravating the injury in his first game back on Sept. 8.

Girardi didn’t believe that Teixeira would be back with the team before Monday, when the Yankees begin their final series of the year against the Red Sox at Yankee Stadium – but even when the Gold Glover does return, the skipper isn’t necessarily sure if he’ll be 100 percent.

“Sometimes you get into a situation, like he was in Baltimore, and your mind tells you, ‘I gotta go.’,” Girardi said. ”You would like to know that he is 100 percent, but I don’t think you are going to know until you get into an intense situation.’’

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