Philadelphia Eagles starting left tackle Jason Peters left the Week 7 game against the Washington Redskins on a cart with a right knee injury and will not return.

Backup offensive lineman Halapoulivaati Vaitai has replaced Peters at left tackle.

Peters was injured when Redskins defensive end Ziggy Hood was pushed into his right knee, causing it to bend inward, his leg was put in a air cast and he was carted off  the field.

"He means a ton," Eagles head coach Doug Pederson said after the game. "To that football team, that locker room, he's a tremendous leader."

The Eagles have already lost Jordan Hicks earlier in the game with an injury, but losing Peters for an extended period of time would be a huge blow to the offense. If Peters is gone for a long period of time, or potentially the season, the team would most likely flip Lane Johnson to left tackle and Vaitai over to right tackle.

The Eagles extended Peters, 35, contract through 2019, he'll get $32.5 million over the next three years and gets $15.5 million guaranteed.

Pederson said they would have more news on Peters on Monday.