Arrington ll is the son of former No. 11 and Penn State football legend LaVar Arrington.
Sahaydak was replaced by Ryan Barker after four games in 2024.
Tyler Warren, Abdul Carter, Kobe King, Jaylen Reed, and Kevin Winston Jr. will all have a chance to demonstrate their talents for NFL scouts ahead of the draft.
Despite losing running back coach Ja'Juan Seider, James Franklin is confident in Nick Singleton and Kaytron Allen and the top coaches they can attract.
Knowles was announced as Penn State's next defensive coordinator on January 27.
Franklin spoke on Jim Knowles, Ja'Juan Seider, Penn State's end to the 2024 season, and moving forward into spring ball.