ANN ARBOR, Mich. (AP) - Wilton Speight handed the ball to Ty Isaac, who was stopped for a loss, and No. 7 Michigan had to settle for a field goal. Again.The Wolverines overcame their offensive struggles, with Donovan Peoples-Jones returning a punt 79 yards for a score and Quinn Nordin tying a school record with five field goals in a 29-13 win over Air Force.