Northwestern's improbable run to the top of the Big Ten West standings has been marked by come-from-behind wins over Nebraska and Rutgers the last two weeks. Now the Wildcats host No. 20 Wisconsin in a key division game. Penn State's Miles Sanders and Trace McSorley face a big test against Iowa's defense. Illinois has questions at quarterback as it goes to Maryland as an 18 ½-point underdog. Freshman sensation Rondale Moore looks to keep piling up yards in Purdue's visit to Michigan State.