Rojas is the third-highest ranked linebacker ever recruited by James Franklin, according to 247Sports.
Montgomery is the first running back to join the Nittany Lions' Class of 2023.
Washington was previously committed to Alabama since January 2022.
Stokes flipped his commitment to Florida less than a month after the Nittany Lions lost an offensive lineman to Georgia.
Molly Martin won the award in Massachusetts, while Amelia White earned the distinction in Indiana.
Both new executives, Vinnie James and Adam Miller, previously worked under Patrick Kraft at Boston College and Temple.