Tashard Choice revealed that he injured his shoulder in the third quarter of Sunday's win over the Rams. The injury happened on a fumble, Choice's second in as many games. "I messed up, man," he said. "It came out and I lost the ball. I can't get a break." DeMarco Murray should be the Cowboys' feature back going forward, regardless of Choice's health status. Rookie Phillip Tanner may be the new No. 2 back.