As a freshman at Notre Dame, Laszewski averaged 6.9 points and 3.9 rebounds per game. In his sophomore season, he averaged 7.4 points and 4.6 rebounds per game. On December 30, 2020, Laszewski posted a career-high 28 points and six rebounds in a 66–57 loss to
Virginia. As a junior, he averaged 13.3 points and 7.3 rebounds per game, earning
All-Atlantic Coast Conference (ACC) honorable mention. ==Career statistics==