The Commanders got a win on Sunday, but they appear to have lost a rookie defensive lineman for the rest of the season.
Mathis was a second-round pick out of Alabama earlier this year. He was injured on his third defensive snap of the game. He also played one special teams snap before departing the 28-22 win.
The Commanders will also be without defensive end Chase Young for at least three more games and a report this weekend indicated he will remain on the physically unable to perform list beyond Week Five. Montez Sweat, Jonathan Allen, Daron Payne, and James Smith-Williams started on the defensive line on Sunday.