MacKay moved up six spots from his seeding to finish 41st in the 50 - swimmer field .
MacKay will become the first Olympian in Notre Dame men 's swimming history when he arrives on campus .
MacKay , who will become the first Olympian in Notre Dame men 's swimming history when he arrives on campus , moved up six spots from his seeding to finish 41st in the 50 - swimmer field .