Getting inside the Friday injury report, which includes the expected debut of a veteran running back in Chicago, the loss of a starting linebacker in Detroit, lingering knee problems of a linebacker in Minnesota and surgery for a sidelined safety in Green Bay:
Chicago Bears: Safety Chris Harris (hamstring) was listed as questionable but appears unlikely to play Sunday against the Carolina Panthers. Tight end Matt Spaeth (calf) might also be sidelined. It's expected that running back Marion Barber (calf) will play in his first game of the regular season. Receiver Earl Bennett and right tackle Gabe Carimi are out.
Detroit Lions: Linebacker Justin Durant (concussion) won't play against the Dallas Cowboys, a big loss for the Lions. Durant has been their leading tackler through three games and will be replaced by Bobby Carpenter. The Lions also ruled out receiver Rashied Davis (foot). Six players are questionable, but all six of them participated in a portion of practice Friday.
Green Bay Packers: As expected, running back Ryan Grant (kidney) and right tackle Bryan Bulaga (knee) won’t play Sunday against the Denver Broncos. Coach Mike McCarthy indicated that veteran John Kuhn would be the second running back into the game behind starter James Starks. Linebacker Clay Matthews (quadriceps) did not practice Friday but is probable. Meanwhile, safety Nick Collins underwent fusion surgery on his neck Thursday, according to multiple reports. Collins has long been ruled out for the season, and the question now is whether he will be ready to play when the 2012 season begins.
Minnesota Vikings: Linebacker E.J. Henderson (knee) is listed as questionable, along with safety Jamarca Sanford (shoulder). Henderson is expected to play Sunday against the Kansas City Chiefs, but coach Leslie Frazier said his snaps could be limited. Henderson told reporters he noticed himself limping on film last Sunday against the Detroit Lions. Waiver wire pickup Xavier Adibi likely would take any snaps Henderson misses. Sanford practiced in full pads Thursday and Friday, so it's not clear how serious his injury is.