The Bears defense has gone to sleep this week with visions of Adrian Peterson in its collective head. That may not be its sole cause for concern, however.
During the preseason, the Bears experimented with Blake Costanzo at middle linebacker with Brian Urlacher out while his injured knee healed.
While the Bears have been dealing with a string of injuries in recent weeks, their opponent on Sunday just suffered a major blow.
Middle linebacker Brian Urlacher already has been declared out of Sundays game against the Minnesota Vikings with his hamstring injury suffered in the Seattle game.
Losing three out of four games constitutes falling off a seasons cliff for the Bears after a 7-1 start.