EUGENE -- Oregon practiced indoors on Wednesday and did so with starting defensive end Austin Faoliu and linebacker Kaulana Apelu still limited by injuries.
Apelu, who second on the team with 51 tackles, was off to the side during the first periods of practice.
The depth of Oregon's linebacker corps could be tested if Apelu can't play or is limited at Arizona on Saturday.
Sophomore Sampson Niu, who has one tackle this season, worked with the first-team defense in Apelu's absence. Backup Isaac Slade-Matautia is also coping with an undisclosed injury and Keith Sims is filling in for him.