Prior to his professional career, Fitzgerald skated four seasons (2015-16 to 2018-19) with Boston College (NCAA), collecting 82 points (17-65-82) in 151 games. Fitzgerald was named to the Hockey East All-Rookie Team (2015-16), the Hockey East Second All-Star Team (2017-18) and named Best Defensive Defensemen that season. He served as captain of the Eagles in his junior and senior seasons.