Dorsey has not played since Week 3 against the New Orleans Saints, and has been out with a calf injury since. The defensive end was listed as questionable with limited participation heading into Sunday's loss against Oakland, but was unable to play.
Receiver Terrance Copper is a surprise showing on the injury report, listed as questionable for the game with calf injury. Copper has played in all seven games for the Chiefs this season, although the veteran has not yet recorded a catch. Copper had just eight receptions for 114 yards in 2011.
Joining Dorsey and Copper on the injury report was tight end Steve Maneri (ankle), cornerback Stanford Routt (hamstring) and receiver Devon Wylie (hamstring). Wylie is probable for the Thursday's game, while Routt and Mareri are listed as questionable.
Running back Nate Eachus (head) and quarterback Brady Quinn (head) are out.