Colts S Khari Willis left in the 3rd quarter of Sunday's loss to the Steelers with a concussion. He'll need to pass through the league concussion protocol before playing against Jacksonville next Sunday. Tavon Wilson stepped in for Willis against Pittsburgh.

The Raiders have activated S Nate Allen from short-term IR. He has been out since suffering a Week 1 knee injury but is expected to reclaim his starting spot next to Charles Woodson, according to Pro Football Talk. That would push T.J. Carrie back to CB, which has featured David Amerson and D.J. Hayden as starters for most of Allen's absence. We'll see how the playing time works out among this crew going forward. All make for fairly risky IDP options this week against Minnesota.

Raiders DB T.J. Carrie left Sunday's loss to the Bears with a chest injury that might cost him further game time. HC Jack Del Rio said Monday that he wasn't yet sure of Carrie's outlook, so we'll have to keep an eye on the practice reports this week. Carrie recently moved to safety to take over for Nate Allen, who's on IR/designated to return with a knee injury. He can't play again until at least Week 10.

The Raiders started CB David Amerson across from D.J. Hayden in Sunday's loss to the Bears, and the former Washington corner played 75 of the 77 defensive snaps. Oakland moved T.J. Carrie from that CB spot to safety, next to Charles Woodson. Carrie seemed to start out covering well and corner and brings kick-return skills should he get his hands on any turnovers. Carrie will be interesting to watch for IDP purposes. Washington once touted Amerson as an exciting prospect but cut him earlier this season -- from a bad secondary. We'll see if a Raiders D with a lot of new pieces -- and upgraded talent overall -- can turn into a fantasy option.