Retherford took down Yianni Diakomihalis in a wrestle-off at Wilkes University to secure his spot on the United States' World Championship team.
The Nittany Lions moved up two spots from their preseason ranking of No. 8.
The Penn State legend was selected as one of seven captains for the Giants' 2019 season.
Willock is a 6'7", 360-pound offensive guard from Paramus, New Jersey, and he picked the Nittany Lions ahead of Georgia, Georgia Tech, and Boston College, among others.
This year's campaign will also donate food for each false start or off-sides generated by fans at Beaver Stadium.
The Nittany Lions outshot their opponents 17-2 in a dominant win away from home.