Redskins running back Tim Hightower had to be helped off the field following a leg injury in the third quarter vs. the Panthers on Sunday. Hightower appeared to hurt his left knee while cutting back on a run.
The Redskins will replace Hightower with Ryan Torain. The pair has split carries in the backfield this season for Mike Shanahan.
Here's more background from SB Nation DC's Mike Prada:
Hightower had been struggling with a shoulder injury this season, but he returned to have a strong game in this one before getting hurt. Hightower had already posted 88 rushing yards in this game, reclaiming the starting job he lost when he got hurt. However, two players needed to help Hightower off the field, so the injury appears serious. It happened when his knee buckled while trying to make a cutback run.