The Bears on Tuesday placed guard Kyle Long and defensive end Mitch Unrein on injured reserve and promoted linebacker Howard Jones and guard Cameron Lee from the practice squad to the active roster.
Bears offensive lineman Kyle Long walks off the field before the Bears-Vikings game.
Long, who turns 29 Tuesday, exited last Sunday's loss to the 49ers in the first half after aggravating a shoulder injury. He has also been bothered by injuries to his ankle and fingers this season.
The three-time Pro Bowler appeared in 10 games with nine starts. Long sat out the first two weeks of the season while recovering from surgery to repair a broken ankle he sustained in Tampa last Nov. 13 that forced him to miss the last seven games last year.
Unrein, a seven-year veteran, finishes the season with 32 tackles, 2.5 sacks and three tackles-for-loss while appearing in 12 games with nine starts.
Jones was signed to the Bears practice squad Oct. 6, played on special teams Nov. 26 in a loss to the Eagles and was waived last Thursday before being re-signed to the practice squad Friday.
Lee spent the first 13 weeks of the season on the Bears practice squad. He entered the NFL this year with the Saints as an undrafted rookie from Illinois State and also spent time this offseason with the Bengals.
The Bears on Tuesday also signed tight end Colin Thompson and offensive lineman Will Pericak to the practice squad.