It wouldn't surprise me if Calgary built Canada's first. Maybe 10 years down the road? CNR? Maybe Potash Corp will migrate to Calgary one day.
World's First Documented Baseball Game: Beachville, Ontario, June 4th, 1838.
World's First Documented Gridiron Game: University College, Toronto, November 9th, 1861.
Hamilton Tiger-Cats since 1869 & Toronto Argonauts since 1873: North America's 2 oldest pro football teams