Defensive tackle Albert Haynesworth and cornerback Nick Harper missed their fourth practice Saturday and are game-time decisions for Monday night's clash at Denver. Haynesworth has not practiced since hurting his right hamstring Nov. 4 in a 20-7 win over Carolina in which he had a career-high three sacks. Harper suffered a concussion in last week's 28-13 loss to Jacksonville and has not practiced. He had an MRI on Friday. "Everything was fine," Coach Jeff Fisher said. If Harper can't play, he likely would be replaced by Reynaldo Hill, a seventh-round pick in 2005 who was the starter opposite Adam "Pacman" Jones. Right tackle David Stewart (ankle) practiced Saturday for the first time this week, and left guard Benji Olson practiced after sitting out Friday in a team decision. Fisher said Stewart is improving and will have a chance to play.