|CB Nathan Vasher||Groin||Doubtful|
|S Adam Archuleta||Hand||Questionable|
|LB Lance Briggs||Hamstring||Questionable|
|OG Ruben Brown||Ankle||Questionable|
|DT Tommie Harris||Knee||Questionable|
|OT Fred Miller||Knee||Questionable|
|CB Charles Tillman||Ankle||Questionable|
|DE Adewale Ogunleye||Hip||Probable|
|RB Adrian Peterson||Calf||Probable|
|LB Brian Urlacher||Back||Probable|
|DT Darwin Walker||Knee||Probable|
|LB Anthony Cannon||Quad||Out|
|RB T.J. Duckett||Ankle||Out|
|LB Alex Lewis||Hamstring||Out|
|OT Jeff Backus||Rib||Questionable|
|DE Kalimba Edwards||Ankle||Questionable|
|WR Calvin Johnson||Back||Questionable|
|OG Damien Woody||Rib||Questionable|
For the Bears, the following players did not take part in practice Friday: Vasher, Briggs, Tillman, and Urlacher. Archuleta, Brown, Harris, and Miller were only able to participate on a limited basis, but Ogunleye, Peterson, and Walker participated in all drills and should be active Sunday in Detroit.
As for the Lions, Cannon, Duckett, Lewis, Edwards, and Johnson were all held out of practice Friday, although there is still hope that both Edwards and Johnson will be able to give it a go come game day at Ford Field. Backus and Woody only participated on a limited basis.
Bears on Offense
The Monsters of the Midway will be dealing with their biggest change on offense in two seasons, but injuries have nothing to do with it. Head coach Lovie Smith simply could not take any more turnovers – the team has committed a league-high 11 in three games – and has demoted quarterback Rex Grossman in favor of Brian Griese. While Grossman has taken the majority of the blame in the media both locally and nationally for an offense currently ranked 30th in the NFL, his receivers have dropped passes and run bad routes, the tailbacks keep putting the ball on the ground, and an experienced offensive line has been thoroughly outplayed so far.
OG Ruben Brown
Jonathan Daniel/Getty Images
Look for the Bears to feature a heavy dose of both Benson and Peterson, who could see more time in the backfield given Benson's recent fumble problems, early and often in order to control the clock and keep Detroit's offense on the sideline.
Bears on Defense
Detroit offensive coordinator Mike Martz never needs an excuse to throw the ball all over the field, but with both Tillman and Vasher most likely out of the line up and S Mike Brown already lost for the year, QB Jon Kitna will be pulling the trigger with regularity Sunday. Rookie defensive backs Trumaine McBride, Corey Graham, and Kevin Payne will all be on the field much more than the Bears truly want at this point in their respective careers, and they'll be asked to defend one of the deepest and most talented groups of receivers in the league. Johnson, the No. 2-overall selection in this past April's draft, will be a gametime decision with a bad back, but Kitna still has plenty of capable targets even without him in Roy Williams, Mike Furrey, and Shaun McDonald.
LB Lance Briggs
Jonathan Daniel/Getty Images
Expect the Bears to play a ton of zone coverage against the Lions because they don't have enough firepower to match up one-on-one with a thoroughbred like Williams or a pest like Furrey, and they'll also have to employ the nickel package more than they would like since Detroit features so many three- and four-receiver sets in the passing game.
John Crist is the Editor in Chief of BearReport.com and a member of the Professional Football Writers of America. To read him every day, visit BearReport.com and become a Chicago Bears insider.