Jack Bain began playing rugby at age fifteen and continued to play as a top-level player for fifteen years from 1924 to 1939. After his playing career ended, he remained involved in the sport as a coach, referee, and administrator and was honoured as a pioneer of the BC Sports Hall of Fame to which he was inducted as a builder in 1977. In the 1930's, playing lock and known as a superb lineout jumper, he was acclaimed as one of Canada's finest rugby athletes and in 1932 was selected to the Canada team that toured Japan, winning a cap in the second test.
The 1936 visiting New Zealand All-Blacks were so impressed
with his play that they selected him to play on their North Island All-Black team in an exhibition game against their South Island All-Black team during their 1936 visit to Canada. In 1939 he was selected to the BC Rep. team that toured California.
Following his playing career, Jack coached his club, the Vancouver Meraloma Club, and was President of the Vancouver and BC Rugby Unions. He was also a co-founder and Director of the BC Lions Football Club; and a member of the British Columbia Centennial, the BC Summer Games, and the 1954 British Empire Games committees. Jack received the Order of Canada in 1967.