LOS ANGELES -- Eagles quarterback Carson Wentz left Sunday's game against the Los Angeles Rams in the third quarter with an injury to his left knee and did not return.

Backup quarterback Nick Foles replaced Wentz.

It is unclear when Wentz was injured, but he was limping badly following a touchdown pass to receiver Alshon Jeffery with just under two minutes to play in the third quarter.

Wentz left the field with trainers after being examined on the sideline. After spending time in the medical tent, he walked into the locker room under his own power with a towel over his head.

Wentz was 23 of 41 for 291 yards, four touchdowns and one interception when he left the game.

The Eagles held a 31-28 lead when he left.

Wentz, who is considered a contender for the NFL MVP Award, has 3,296 yards, 33 touchdowns and seven interceptions.

A serious injury to Wentz would be a devastating blow to the Eagles. His status is unclear.

Wentz played in all 16 games during the 2016 season, but suffered fractured ribs in last year's preseason and a broken hand during his college career at North Dakota State.

Eliot Shorr-Parks may be reached at eshorrpa@njadvancemedia.com. Follow him on Twitter @EliotShorrParks. Find NJ.com Eagles on Facebook.