Barkley signed a four-year, fully guaranteed $31.2 million contract on the same day he reported to his first NFL training camp.
Barkley's merchandise has sold more than every other rookie in the NFL this offseason.
Penn State's 2019 recruiting class will likely only feature 18-20 prospects, but it would love to see these three join the fold.
Robinson left Penn State in December, but he's eligible to play for the Blue Hens this season.
A suspect turned himself in on July 13 and has been charged with murder in the stabbing death of Schellenger, who made one appearance for Penn State in 2000.
Dunmore picked Penn State over Auburn, Miami (FL), and Florida, among others.