The Ravens have moved cornerback Jalyn Armour-Davis to injured reserve, meaning he will miss at least the next four games.
Armour-Davis, who has been working into the Ravens' cornerback rotation, suffered a hamstring injury last week in Dallas and didn't practice this week. This is another in a string of injuries that have hampered the third-year cornerback. He was limited to just 11 games the past two seasons but had been healthy all summer.
Baltimore's cornerback depth will be tested with Marlon Humphrey, Brandon Stephens, Nate Wiggins healthy. Rookie T.J. Tampa could see his first game action. The Ravens do have a lot of flexibility with their safeties.
The Ravens may also be missing one of their big bodies in the middle of their defense Sunday night against the Buffalo Bills, as nose tackle Michael Pierce has been downgraded to doubtful to play.
Pierce suffered a shoulder injury in last week's game in Dallas but returned to action. He missed Wednesday's practice but was a full participant Thursday and Friday and carried no injury designation.
Pierce has seven tackles and a half sack through the first three games this season. If he can't play, that would put more on the plate of Travis Jones, who has been a standout piece of the defense so far this season, and Broderick Washington. The Ravens would also likely have defensive end Brent Urban active for the game.
The Ravens activated running back Chris Collier from the practice squad to face the Bills.
