Dustin Johnson continued to play with steam during the first round of the RBC Canadian Open, shooting a six-under 66 that included an eagle three at the 18 hole at Glen Abbey Golf Club in Oakville, Ontario, on Thursday.
Johnson, who won the U.S. Open and WGC-Bridgestone Invitational back to back, is tied for the lead with Luke List, and one stroke ahead of Canadian amateur Jared du Toit, Jon Rahm, Chesson Hadley and Kelly Kraft. Johnson is searching for his third win in his last four tournaments played.
Jason Day, defending his title at the Canadian Open, placed himself in the mix with a three-under 69. He is three strokes behind the leaders, and tied with Matt Kuchar and Greg Chalmers for 11th.
"It's probably the hardest I've played up here," said Day. "You can tell by the course how firm and fast it is. You hit a drive down the middle and you get it on the right brown spot, it's going forever. If you hit it in the rough and you hit the brown spots, they just keep running. Obviously it's a premium on hitting fairways. It really is difficult to try and get any sort of score going when you're playing out of the rough here."
List, looking for his first career PGA Tour win after earning a tour exemption this season through the Web.com Tour finals, shot a bogey-free six-under 66 on Thursday.
Brandt Snedeker, winner of the 2013 Canadian Open, sits just two strokes back following a four-under 68 and is tied with Brendon de Jonge, Steve Wheatcroft and Cameron Tringale.
Bryson DeChambeau struggled in his ninth professional start, shooting a four-over 76. He is tied for 116th with Matthew Fitzpatrick and Stewart Cink.
Olympic Canadian golfers David Hearn and Graham DeLaet shot 74 and 77, respectively, attempting to become the first Canadians to win this tournament since 1954.
[Click here for the entire leader board from Glen Abbey.] (http://www.golfdigest.com/story/pga-tour-leaderboard)