Washington Redskins running back Derrius Guice (knee) has already been ruled out for Week 15 against the Philadelphia Eagles, interim head coach Bill Callahan announced.
Guice is believed to have suffered an MCL sprain in Sunday's Week 14 loss to the Green Bay Packers. Adrian Peterson will take back over the every-down role for Washington.
Guice has 245 rushing yards (5.8 per carry), 79 receiving yards, and 3 touchdowns in five games this season.
Source: Adam Schefter, ESPN