Tatsch has appeared in each of the last three games.
Fitzgerald was fired from Northwestern in 2023 for hazing allegations.
The Nittany Lions still hold one commitment from an offensive tackle in the 2026 class.
Franklin will now compete with Penn State in the Northeast.
Dennis-Sutton tied a Penn State record with another blocked punt against Michigan State.
"These are my kids, and there's nothing more than to make your kids happy."