Friberg passed for 2,293 yards and 14 touchdowns as he led the Little Lions to a 12-2 record last season.
Dalton and Gellerstedt joined five of their teammates in the transfer portal on Tuesday.
"I feel that in order to keep my mental in check and reach my full potential as a person and as a player I need to explore other options."
Barkley became the second player in New York Giants history to win the award after his 2,000-yard debut season in the NFL.
Three Penn State football products will partake in the Alliance of American Football's inaugural season, kicking off the week after the Super Bowl.
Losing experienced talent at any position can hurt, but the Nittany Lions are in good shape to replace the outgoing wideouts.