Chin-DeGraves will have two years of eligibility remaining.
Herrington becomes Penn State's first addition out of the transfer portal this offseason.
Fink appeared in just 10 games with the Milwaukee Admirals before getting called up to the NHL.
Scade becomes the fifth Nittany Lion to ink a professional deal following the team's NCAA Tournament exit.
Cover recorded 52 points with the London Knights in the regular season.
The Nittany Lions face some serious roster turnover heading into next season.