[1] Growing up, Mercure played hockey and soccer, joining Ottawa South United when he was nine years old.
[4] Mercure was set to attend MacEwan University and play for the men's soccer team beginning in 2021, but ultimately did not join them.
[6] On September 14, 2024, he played his first game, scoring five goals and adding an assist in a 15-0 victory over Fleming College.
[7] On August 17, 2019, he made his debut for the senior team of Ottawa South United in League1 Ontario against Master's FA, which was his only appearance of the season.
[8] After appearing with the reserve squad in the 2020 season, he returned to the senior team in 2021, now in the Première Ligue de soccer du Québec.