Although he didn't bust out his legendary James Franklin impression, Key did portray an NBA icon, perform a musical number, and beat the living hell out of some Muppets.
Penn State is currently evaluating new federal guidelines on mask-wearing and could change on-campus rules in the near future.
The Nittany Lion Shrine and Pennsylvania State University sign behind Beaver Stadium will close for about four weeks starting June 1.
Local municipalities and businesses can still enforce stricter guidelines of their own if they'd like.
Freiermuth previously wore No. 87 at Penn State for three seasons.
"Many people have commented positively. How much difference it makes remains to be seen. More people will recognize a wrongful conviction. We cling to the hope that the court will."