What happened: Michigan and Penn State combined to rule out 21 players on Saturday's final availability report ahead of their meeting at Michigan Stadium. The Wolverines listed eight absences, including offensive linemen Andrew Sprague, Ace Hamilton, and Brady Norton, along with wideouts Kendrick Bell and Braydon Alford, running back Micah Ka'apana, defensive end Julius Holly, and tight end Zack Marshall. Penn State ruled out 13 players, headlined by wide receiver Koby Howard, defensive end LaVar Arrington II, three cornerbacks, and three additional defensive linemen.

Why it matters: Michigan enters seeking its first Big Ten win of the season under head coach Kyle Whittingham, but losing three offensive linemen thins protection for quarterback Bryce Underwood and tests the ground game. Penn State has dropped three straight conference contests and must navigate depleted defensive line and secondary rotations without Howard's perimeter threat.

What to watch: Pre-game warmups will determine the status of Michigan offensive lineman Jake Guarnera alongside Penn State game-time decisions Cam Smith, Yvan Kemajou, Chase Sowell, and Armstrong Nnodim.