Jim Harbaugh has been banned from Michigan’s three remaining regular-season games by the Big Ten for a sign-stealing scheme that has rocked college football. Harbaugh was disciplined by the conference less than 24 hours before the Wolverines play No. 9 Penn State on the road in their toughest matchup of the season so far. His team has a shot to win a third straight Big Ten title and the school’s first national championship since 1997.