Hamler's roommate at IMG Academy is now an offensive lineman for the Wolverines.
Playing to Michigan's weaknesses and avoiding the Wolverine pass rush will be crucial for Penn State this weekend.
The CFP committee unveiled its first top 25 rankings of the 2018 season on Tuesday evening.
Penn State is 3-7 at Michigan Stadium all-time and has won just once in its last eight trips to the Big House.
It was an unusually quiet week for most Nittany Lions, but Barkley led the way once again.
“They disrespected us with the loss that we took last year. Like [Michigan defensive coordinator Don] Brown said, we got to take it personal.”