In the fourth weekend of Big Ten play, the number of undefeated teams in conference action was whittled to one after Iowa improved to 3-0 with a road victory over Wisconsin to claim sole possession of first place. Meanwhile, Ohio State suffered its first Big Ten loss at Purdue to fall into a tie for second place with Michigan State, which knocked off Northwestern for its third straight win to move to 3-1 in conference competition. In other conference action, Penn State blanked Minnesota while Indiana defeated Illinois. In non-conference play, Michigan put on a record offensive performance in a triumph over Delaware State. Check out the recaps of each of the six Saturday games by clicking on this link.