McCallum, a junior from Cape Town, South Africa, had an incredible week at the 2023 PSAC Swimming Championships. Stephen set two new individual school records--in the 200 free in a time trial in 1:37.28, and in the 100 free in 44.64. McCallum also swam the anchor leg in all four of Gannon's relays in the event, earning All-PSAC honors in each as well as posting new school records in the 800 free relay, 200 medley relay, and 400 medley relay. He now awaits news of potential NCAA qualification, which should be announced sometime this week.