AP

Oakland Raiders running back Darren McFadden played for the first time in five weeks Thursday night against the Denver Broncos.

Now he may be sidelined once again.

According to Vic Tafur of the San Francisco Chronicle, Raiders head coach Dennis Allen said McFadden was unable to finish the game Thursday night after re-injuring his ankle. Allen said he didn’t know the severity of the injury.

McFadden missed the last four games after suffering a high-ankle sprain against the Tampa Bay Buccaneers on Nov. 4. McFadden carried the ball 11 times for 52 yards and caught two passes for 12 yards and a touchdown in his first game back.

McFadden carried for six yards on a 1st and 10 with 6:56 left in the game. The Raiders only ran two more offensive plays after that carry by McFadden so it seems likely to assume the injury occurred on one on those final three plays.