Dustin Johnson pulled on the Edmonton Oilers jersey with "Gretzky 99" on the back, lined up his shot, and drove over the water and on to the green at No. 7 on Glen Abbey Golf Course.

American through-and-through, the RBC Canadian Open is Johnson’s home tournament by marriage, with future father-in-law Wayne Gretzky growing up in nearby Brantford, Ont.

But playing in a pro-am tournament on Wednesday morning, Johnson was encouraged to embrace his extended family’s sport of choice at Glen Abbey’s seventh hole, which has a tee box surrounded by hockey boards and tournament volunteers stationed at the hole wearing referee’s stripes.