[2] DeMarco played professionally as an offensive lineman for the NFL's Detroit Lions in 1949, before joining the Edmonton Eskimos of the Western Interprovincial Football Union for two seasons beginning in 1951.
DeMarco joined the Saskatchewan Roughriders in 1953, and was a member of the team for four years until the time of his death.
[1] DeMarco, along with Roughriders teammates, Becket, Sturtridge, and Ray Syrnyk, were passengers on Trans-Canada Air Lines Flight 810 with another CFL player, Calvin Jones, of the Winnipeg Blue Bombers.
[1] All five players were present at the 1956 East–West All-Star game in Vancouver, British Columbia, and were headed back to their respective teams' home cities.
[1] The five players were accompanied by 54 other passengers, and 3 crew members who all lost their lives in Western Canada's worst aviation disaster on December 9, 1956.