OAKVILLE, ON - JULY 21: Dustin Johnson reads a putt on the 16th green during the first round of the RBC Canadian Open at Glen Abbey Golf Club on July 21, 2016 in Oakville, Canada. (Photo by Gregory Shamus/Getty Images)
OAKVILLE, ON - JULY 21: Dustin Johnson watches his tee shot on the 16th hole during the first round of the RBC Canadian Open at Glen Abbey Golf Club on July 21, 2016 in Oakville, Canada. (Photo by Gregory Shamus/Getty Images)
OAKVILLE, ON - JULY 21: Dustin Johnson watches his tee shot on the 16th hole during the first round of the RBC Canadian Open at Glen Abbey Golf Club on July 21, 2016 in Oakville, Canada. (Photo by Gregory Shamus/Getty Images)
OAKVILLE, ON - JULY 21: Dustin Johnson watches his tee shot on the 16th hole during the first round of the RBC Canadian Open at Glen Abbey Golf Club on July 21, 2016 in Oakville, Canada. (Photo by Gregory Shamus/Getty Images)
OAKVILLE, ON - JULY 21: Dustin Johnson putts for birdie on the 16th green during the first round of the RBC Canadian Open at Glen Abbey Golf Club on July 21, 2016 in Oakville, Canada. (Photo by Gregory Shamus/Getty Images)
