Cowboys DT Lissemore leaves with concussion

ARLINGTON, Texas -- Dallas Cowboys defensive tackle Sean Lissemore left Thursday's final preseason game with the Houston Texans with an injury. Lissemore started at defensive tackle and got nicked up on a run play in the third quarter.

Update: Lissemore confirmed that he suffered a concussion.

The Cowboys were playing Lissemore because of health issues along the defensive line and to give him some snaps. He missed nearly two weeks of practices because of a groin injury, but played in the last two preseason games.

Defensive tackle Jay Ratliff, defensive end Anthony Spencer and defensive end Tyrone Crawford are nursing injuries. Crawford (Achilles) is out for the season, and Ratliff (groin and hamstring) will miss the first six weeks of the regular season because he's on the physically unable to perform list. Spencer is expected to return in Week 1.

Losing Lissemore for any period of time would thin a unit in need of personnel.

Cornerback Micah Pellerin also left the game with an injury in the third quarter.

The exact nature of the injuries isn't known.