Teixeira is unable to run and isn't starting Friday night at Atlanta.
Teixeira says his shin doesn't feel better following an off-day Thursday. More tests may be needed on his injury.
Teixeira says ''unlucky is an understatement for the timing of this thing'' as the Yankees compete with AL East-leading Toronto. He says he is concerned because the injury is not healing faster.
Jacoby Ellsbury, who did not play on Wednesday because of a hip injury, is starting in center field and hitting leadoff.