CORVALLIS -- Oregon will be without its top defensive lineman for the Civil War.
Senior Jalen Jelks, who has 54 tackles with 7.5 for loss including 3.5 sacks this season, is out due to injury, according to an Oregon spokesman.
Jelks, who leads Oregon defensive linemen in tackles, and fellow defensive end Austin Faoliu missed practice on Tuesday and Drayton Carlberg and Gary Baker worked with the first-team.
Faoliu, who has 36 tackles with two sacks in nine games, is expected to play.
The Oregonian will update this story.