Defensive coordinator D'Anton Lynn has been a pivotal piece of Penn State's leadership group.
The move comes after a week of three ranked wins.
Fink will likely play in the AHL for the rest of the season.
After two years in Happy Valley, Rucci's big frame will hope to make an impression come draft day.
Clifford appeared in 52 games for the Nittany Lions.
Zeta Psi and Phi Gamma Delta will each host a market in the month of April.