Turner is DONE.
Only 5 games last year, including playoffs, did he average over 4 yards a carry. He's not a receiving threat, doesn't have any speed, and also fumbled 3 times last year losing 1.
He isn't going to come in and do better than what McGahee or Moreno did last year, not a chance. Heck I'd really wonder if he'd be any better than Lance Ball was.