Washington Redskins running back Derrius Guice underwent an MRI on his right knee the morning after making his NFL debut, coach Jay Gruden confirmed in a press conference Monday.
Guice is just over a year removed from tearing the ACL in his left knee.
Guice didn't look like himself in gaining just 18 yards on 10 carries Sunday in a 32-27 loss at the Philadelphia Eagles. He went to the injury tent on the sideline during the game but downplayed concerns afterward.
Gruden last week informed veteran Adrian Peterson that Guice would be the top running back to start the season. Peterson was a healthy scratch against the Eagles but could be back atop the depth chart for Washington's home opener against the Dallas Cowboys if Guice is out.