Pitching struggled throughout the series as Penn State burned through 11 arms and allowed 25 runs over the three games.
Fashanu is expected to be a first-round pick in the 2024 NFL Draft.
Dane Dowiak's two goals guided the Nittany Lions to win a close game in Columbus.
The Nittany Lions coughed up a 23-point lead in the final road game of the regular season.
A first period conversion by Mya Vaslet was the game-winner for the Nittany Lions.
"I don't think words describe it. You dream of moments like this."