DiNardo went to college at the University of Notre Dame, where he played guard from 1972 to 1974 for coach Ara Parseghian. DiNardo was a member of the school's 1973 national championship team, and an All-American in 1974. Incidentally, DiNardo honed his blocking skills against Rudy Ruettiger, a member of the scout team during DiNardo's time at Notre Dame. DiNardo's older brother, Larry, was also an All-American at Notre Dame from 1968–70.