Reed Hoffmann, Associated Press
Kansas City Chiefs quarterback Kyle Orton (8) is sacked by Oakland Raiders defensive tackle Richard Seymour (92) during the first half of an NFL football game at Arrowhead Stadium in Kansas City, Mo., Saturday, Dec. 24, 2011.

ENGLEWOOD, Colo. — Brian Dawkins is being held out of the Denver Broncos' practice because of a neck injury that has bothered him for most of the month.

Fellow starting safety Quinton Carter (lower back) and nickel cornerback Chris Harris (neck), who leads all rookie DBs with 62 tackles, are both participating in the team's final full-padded practice after leaving last weekend's loss at Buffalo with those injuries.

The Broncos are hoping for a healthy secondary to face former teammate Kyle Orton, who brings the Kansas City Chiefs (6-9) to town Sunday with a chance to beat the team that benched him in favor of Tim Tebow.

Orton can exact some revenge on the Broncos (8-7) by denying them their first playoff berth since 2005, when they last won the AFC West.