‘Fairchild isn’t running Martz’s offense with the Bills. There aren’t 400 pages in his playbook, but it’s more open than the one Jauron oversaw in the Run-and-Shoop era. Still, the greatest challenge today should be stopping the run because McGahee leads the NFL in rushing with 389 yards, 22 more than St. Louis’ Steven Jackson. The Bills will stick with the run even if it doesn’t work initially, and while their running game is solid, this isn’t the best offensive line the Bears will face, especially if right guard Chris Villarrial is out with a sprained ankle, as expected. Still, McGahee is a solid guy capable of embarrassing defenders with a second-gear burst if he gets into the secondary. ”He’s the best back we’ve faced this year; there’s no doubt about it,” Urlacher said.’