The Chiefs lost quarterback Matt Cassel in their preseason loss to the Seahawks on Saturday night. Cassel, who was on the field for just three plays, limped off to the locker room with a leg injury. Seattle won the game 14-10. The quarterback was injured the first time he dropped back to pass, dragged down from behind after the pocket collapsed. Cassel called timeout, then limped down the tunnel toward the locker room with a left leg injury and didn't return.