St. Marseille started his National Hockey League career with the St. Louis Blues in 1967. He would also play for the Los Angeles Kings. He would retire from the NHL after the 1977 season. He is a great example of perseverance. St. Marseille played amateur hockey in his hometown of Levack and was ignored by NHL teams. He played senior hockey for the Chatham Maroons in 1962-63 and then with the same team in the International Hockey League in 1963-64. When the team folded in 1964 St. Marseille moved to the Port Huron Flags for three seasons.