[1] He later joined the CF Montréal Academy and was invited to attend pre-season with the first team ahead of the 2023 season.
[2] Alphonse began his senior career with CF Montréal U23 in the Première ligue de soccer du Québec.
[4] During 2023, he was invited to play with the HFX Wanderers U23 team for a couple of exhibition matches against German club Holstein Kiel U23.
[4] In late June 2024, Alphonse signed a professional contract with the HFX Wanderers of the Canadian Premier League for the remainder of the 2024 CPL season with club options for 2025 and 2026.
[9] In April 2022, Alphonse was called up to the Canada U20 for the first time for a training camp, before later being named to the squad for the 2022 CONCACAF U-20 Championship.