Tracy Walker's season is officially over, and the Detroit Lions are promoting a familiar face to fill the safety's spot on the 53-man roster.
The Lions placed Walker on injured reserve Tuesday and signed linebacker Anthony Pittman off their practice squad to take his place.
Pittman has played in every game this season as a practice squad elevation to the game day roster. He has two special teams tackles and is third on the Lions with 66 special teams snaps. Teams can only elevate a player from the practice squad to the game day roster three times in a season.