Furmanek will reportedly join the program as a tight end with a preferred walk-on offer.
Blackledge, who quarterbacked Penn State's 1982 national championship team, announced his ESPN exit Thursday.
Bryant announced his departure as Colorado's assistant director of player personnel on January 31.
Clifford's sendoff will take place at 6:35 p.m. on Saturday, July 15, at Medlar Field at Lubrano Park.
The addition lands the Nittany Lions' fourth offensive lineman in the Class of 2023.
For five days, the Leishman Trophy will be available for Penn State fans to look at from 10 a.m. to 4 p.m.