Mark McMorris fell in two of three attempts to finish eighth in the 12-man final, while fellow Canadian Cameron Spalding placed tenth. McMorris, 32, was competing through injuries including a concussion and abdominal strain suffered in a training crash on Feb. 4.
Gold went to China's Su Yiming on his 22nd birthday, with Japan's Taiga Hasegawa taking silver and American Jake Canter earning bronze. New Zealand's Dane Menzies, born in Alberta, finished seventh.