Penn State assistant coaches Kirk Campbell, Kevin Smith, and Kevin Reihner will join Mark Dupuis On Ricky Rahne's staff at Old Dominion.
Moorhead led the Bulldogs to a 14-12 record in his two seasons with the team.
Castro-Fields will be back as the unquestioned leader of Penn State's cornerbacks for his senior year.
Hamler was a go-to wide receiver for Penn State over the past two seasons.
Penn State Athletics confirmed that Limegrover's contract will not be renewed, and a national search for his replacement will begin immediately.
Matt Miller of Bleacher Report is another draft expert who expects Yetur Gross-Matos to be a first round pick in the 2020 NFL Draft.