The Wolverines scored all 21 points of their points following a Becht turnover.
Rocco Becht turned the ball over three times in Penn State's fourth-straight Big Ten loss.
12 other Nittany Lions are ruled out ahead of the 3:30 p.m. kickoff.
Who wins in a fight? A wolverine, or a Nittany lion?
National media has eyes on the Nittany Lions' star linebacker through six games.
Underwood was the nation's No. 1 ranked prospect in Class of 2025.