Yet another Dallas Cowboys wide receiver has landed in the trainer’s room.

Cowboys No. 3 pass-catcher Randall Cobb exited Thursday’s practice with what the team is dubbing a back injury. He was listed as a Did Not Practice after getting in a full session Wednesday.

Per ESPN’s Todd Archer, Cobb appeared to hurt his back going to the ground during ball-security drills.

A newcomer to Big D, Cobb has been largely ineffective in recent weeks, failing to clear 69 receiving yards since Dallas’ season-opening blowout of the Giants. He’s totaled 17 catches for 210 yards (12.4 yards per grab) and one touchdown across five games, the distant third option behind Amari Cooper and Michael Gallup.