Jansen sprained his left knee during a 24-10 loss to the Baltimore Ravens a week earlier, one of three Washington linemen hurt in the game. Left tackle Chris Samuels is out for the season with a torn right triceps, and reserve Justin Geisinger is out with a knee injury. Jason Fabini started at Jansen's spot against Cincinnati.
Rookie safety Chris Horton and defensive tackle Cornelius Griffin also were inactive because of injuries.
The Bengals were missing left tackle Levi Jones, who has been limited by various injuries all season.
Copyright 2008 by The Associated Press