Forte was off to a slow start, rushing for just 12 yards on five carries before leaving the game with what looked to be a very painful injury.
Forte has been an absolute beast for lucky fantasy owners this season and his absence will haunt those owners as the playoffs approach.
Forte has 250 touches thus far in 2011 and has racked up 1,495 yards with five weeks still left to play.
Who's the Backup?
Veteran Marian Barber will take over the RB spot for Forte. Barber leads the Bears this season with five rushing touchdowns and is averaging 3.8 yards per carry.
Devastation Scale (1-10)
With QB Jay Cutler already lost for the season with a injured thumb that required surgery, the loss of Forte would prove incredibly costly for the Chicago Bears.
Inexperienced QB Caleb Hanie already needed tons of help from the running game to help lead the Bears into the postseason.
Timeline for Return
Forte is out and will remain out for the rest of the game.
There is no available timeline for Forte's return yet as he is still being tested for a serious knee injury.
What They're Saying
Most people around the league are saying that the injury looks bad, and that Forte is likely being tested for a potential MCL injury.
Sean Jensen on Twitter broke the news that Forte is believed to have suffered a sprained MCL, which could sideline him for a significant amount of time.