Both golfers are within striking distance of the joint leaders after round one.
Defending champion Rory McIlroy is 1 under par after his opening round at the Canadian Open in Toronto.
He lies 4 shots behind leaders Aaron Rai, Corey Conners, Justin Lower and Chesson Hadley.
Offaly's Shane Lowry is even par after a busy round that included five birdies, four bogeys and a double bogey.
David Carey is 1 over.