Williams was the No. 1 player in Pennsylvania in the class of 2023.
Exinor did not register a stat in his true freshman season.
Reynolds has logged significant snaps with Penn State since he arrived in 2024.
"I am honored to work with countless volunteers who selflessly give their time to make a difference in the lives of families who need it most."
Dennis-Sutton started in every game this past season.
Siafa appeared in one game with the Nittany Lions over four years.