DT Tommie Harris, who sprained his left knee last Sunday, will start today's game at Detroit.
However, four defensive starters from last week are out.
CB's Charles Tillman and Nathan Vasher are out.
LB Lance Briggs will be sidelined by a hamstring pull.
SS Adam Archuleta will sit out with a broken right hand.
Here is how the secondary will break down:
Ricky Manning Jr. will start at right cornerback in place of Vasher.
Trumaine McBride will start at left cornerback in place of Tillman.
Brandon McGowan will start at strong safety in place of Archuleta.
The Bears inactives: Kyle Orton (third QB), FB Lousaka Polite, G Josh Beekman, WR Mike Hass, Archuleta, Vasher, Tillman and Briggs.
For Detroit, WR Calvin Johnson will not play after testing his back. Also inactive are: Dan Orlovsky (3rd QB), RB T.J. Duckett, LB Anthony Cannon, LB Alex Lewis, G Damien Woody, G Manny Ramirez and DE Kalimba Edwards. Stephen Peterman will start in place of Woody at RG. Corey Smith will play in place of Edwards at RDE.