The new hire comes five days after former running backs coach Ja'Juan Seider reportedly took the same position at Notre Dame.
Headlined by a new No. 11, the newest Nittany Lions got their first numbers ahead of spring practice.
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.