Torain rushed for only 200 yards this year, with 135 coming in the win over the St. Louis Rams on Oct. 2. He then struggled when given a shot at the starting job after Tim Hightower was lost for the season with a knee injury, leading to the emergence of the rookies.
Torain rushed for 742 yards for the Redskins last year.
The Redskins on Tuesday also have promoted receiver Aldrick Robinson from the practice squad. Robinson was a sixth-round pick in April.