Carson (neck) was placed on injured reserve Friday, ruling him out through Week 9, Brady Henderson of ESPN.com reports.

EDGE Analysis

Carson already has missed one game and now will be out for at least three more. His earliest possible return is Week 10 (Sunday, Nov. 14) against the Packers, as his neck injury apparently hasn't healed the way the Seahawks had hoped. Alex Collins, DeeJay Dallas and Travis Homer will be the team's running backs Sunday night against the Steelers, with Rashaad Penny (calf) potentially returning from IR for Week 7 versus New Orleans.