Originally written September 09, 2012 on MLB Injury News:

Mark Teiexeira, who just returned to the New York Yankees' lineup last night, will miss at least four games, possibly the rest of the season.  According to Andrew Marchand of ESPN New York, the Yankees' first baseman re-injured his ailing left calf after attempting a head-first slide at the end of last night's game and will be out until at least Friday.

Four games wouldn't be nearly as bad as some other projections for Teixeira's injury.  David Ginsburg of Yahoo! Sports says Teixeira may be done for the year.  Ginsuburg reports that Teixeira will undergo an MRI on Monday, but the Yankees have a real concern that he could be done for the rest of the season.

Teixeira played his last game before being sidelined with the calf injury on August 27th.  He was not placed on the 15-day DL as the Yankees hoped he could rest and rehab, then return.  And he did just that when he returned to action last night.  However, Teixeira's return was short-lived.  In the top of the ninth last night, Teixeira made the final out of the game with a head first slide into first base.  Replays showed that he had actually beat the throw and should have been safe.  However, the sprint and the slide ultimately may have ended Teixeira's season.

When asked about the possibility of Teixeira being done for the year, Yankees' skipper Joe Giardi said:
"There is part of me that wonders that," Girardi said of Teixeira's setback resulting in a prolonged absence. "There is basically 3½ weeks left. If it does go back to square one, then I'd really wonder."
Teixeira is hitting .255/.336/.478 with 23 home runs.  Despite missing time twice now (this will be the third time), he has 81 RBI - second on the team.  The Yankees, in defeat last night, fell into a tie with the Baltimore Orioles.  The race in the American League East is tight, and the Yankees can ill-afford anymore blows to their starters.  In the time that Teixeira was out before Saturday's game, the Yankees were just 4-6.

The Yankees are 78-61, tied with the Orioles.  Both teams hold a two game lead over the Tampa Bay Rays.  Should the Yankees lose the division lead, they will still have a shot at the Wild Card as only Oakland has a better record.

If Teixeira is to miss the rest of the season, the Yankees may explore a different long-term option, but in the short-term they will likely use Nick Swisher primarily at first much like they did in Texiera's absence from the original calf injury.
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