Murph hits the nail on the head. Compare 2001 to 2002. In 2001, the Bears O-line had no injuries the WHOLE year. The running game looked awesome (A-Train's rookie year) and Booker put up his usual 1,000 yard season. Last year, with the same QB crew, the O-line was decimated. The running game was awful, yet there was Booker punching the clock for another 1,000 yard season. This year, the O-line is again hurting--real bad. Stewart is shockingly an upgrade at QB and has a history of locking onto a favorite (look at how it took Maddox in Pitts for Burress to even emerge from Ward's shadow). In Chicago, Booker is the only receiving option. He will do well despite the challenges the team will face. I'd go with him in Week 1.