IRVING (AP)  Cowboys linebacker DeMarcus Ware missed Wednesday’s practice to rest a back injury that flared in the last game.

Ware has been battling back spasms. Coach Jason Garrett said his absence was precautionary. He is expected to practice Thursday and to play Sunday against St. Louis.

Ware is tied for third in the NFL with seven sacks. He was the NFL’s sack leader last season and in two of the last three seasons. He’s never missed a game in his career.

Also Wednesday, second-round pick Bruce Carter made his debut on the practice field. The linebacker has been on the non-football injury list since training camp. He’s coming off knee surgery. Dallas still has a few weeks to decide whether to activate him.

(Copyright 2011 by The Associated Press. All Rights Reserved.)