Ohio State can clinch the Big Ten East with a win on Saturday.
Ohio State takes on Illinois on Saturday afternoon, and if the Buckeyes win, they'll be playing in the Big Ten title game. Michigan's loss to Wisconsin gives the Wolverines three losses in the league, and if Ohio State knocks off Illinois, the Buckeyes can't finish with more than two.
Ohio State holds tiebreakers over both Michigan State and Penn State - so even if both of those programs win out, the Buckeyes would still get the nod.
Ohio State, with a win over Illinois, would face Wisconsin in the league's title game. The Badgers are currently 11-0 with a rivalry game against Minnesota left on the schedule.
Still, an Ohio State win over Michigan will be vital for the team's College Football Playoff hopes.