In what will be viewed as a remarkable comeback if he only steps foot on the field Sunday, the Kansas City Chiefs activated tailback Priest Holmes on Saturday for their game against the Oakland Raiders. The four-time Pro Bowl back has not appeared in a game since suffering serious head and neck trauma in an Oct. 30, 2005 contest against the San Diego Chargers. He has spent nearly two years recovering from the injuries, and most league observers felt that Holmes would never play again. Holmes, 34, spent the final half of the 2005 season on injured reserve and the entire 2006 campaign on the NFL's physically unable to perform list. Because of the head and neck trauma and a serious hip injury that threatened to end his career in 2004, Holmes has played in only 15 games since the end of the 2003 season.