The third-year running back out of Stanford injured his ribs in a Week 4 victory over the Chicago Bears.
Montgomery has 281 yards from scrimmage and has scored three touchdowns in four games this season.
Tackle Bryan Bulaga, who has been battling an ankle injury, also is active play while linebacker Ahmad Brooks (back) and cornerback Kevin King (concussion) are inactive.
Other injury news we are tracking on Sunday:
In other Raiders news, rookie cornerback Gareon Conley, who has been ruled out for Sunday, will meet with doctors Tuesday to evaluate his lingering shin injury. There's a chance he be put on the shelf for weeks to heal, a source told Rapoport.
- Detroit Lions quarterback Matthew Stafford (ankle) will play through pain at New Orleans but wide receiver Kenny Golladay (hamstring) is inactive. Defensive end Ezekiel Ansah (knee) is active, but guard T.J. Lang (back) will not play.
- Tampa Bay Buccaneers defensive end Robert Ayers (back) is expected to play at Arizona, while linebacker Lavonte David (ankle) remains a game-time decision, according to Rapoport.