The Yankees put Mark Teixeira back on crutches Tuesday and on the disabled list three days later.

The club announced late Friday morning that the veteran first baseman, hobbled since fouling a ball off his lower right leg in an Aug. 17 game against the Twins, had been placed on the 15-day DL with a right shin bone bruise.

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It was yet another sign, though hardly an unexpected one given events earlier in the week, that Teixeira, still the club's leader with 31 home runs and second with 79 RBI, is not getting any better.

On Monday the Yankees sent Teixeira home from Boston to be reevaluated by Yankees' team physician Dr. Christopher Ahmad Tuesday morning. Ahmad's diagnosis reaffirmed the initial one done Aug. 18, that Teixeira had sustained a significant bone bruise.

But, general manager Brian Cashman said Tuesday in Boston, the only good news in that was the fact there was no fracture.

"His bone bruise has not healed at all," Cashman said before Tuesday night's game. "There is no stress fracture. That was the biggest worry because he hasn't responded to it. But the bone bruise has not healed in any way, shape or form. He has some soft-tissue inflammation and some inflammation around the nerve. So he received some sort of injection to calm that down. But obviously, the bone bruise is the big issue and there's been no healing ... He was on crutches initially and came off because he felt better. But they're putting him back on crutches and we're looking at weeks."

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Rookie Greg Bird has been filling in for Teixeira and, aside from Monday's rough night against the Red Sox, has performed reasonably well, posting a .254/.333/.429 slash line in 18 games with three homers and 12 RBIs.