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OTTAWA, ON - OCTOBER 28: Head coach Bob Hartley of the Calgary Flames has some words with referee Dan O'Halloran #13 during an NHL game at Canadian Tire Centre on October 28, 2015 in Ottawa, Ontario, Canada. (Photo by Jana Chytilova/Freestyle Photography/Getty Images)

OTTAWA, ON - OCTOBER 28: Head coach Bob Hartley of the Calgary Flames has some words with referee Dan O'Halloran #13 during an NHL game at Canadian Tire Centre on October 28, 2015 in Ottawa, Ontario, Canada. (Photo by Jana Chytilova/Freestyle Photography/Getty Images)