America's Scott Piercy won the Canadian Open by a shot after firing a final-round 67 to beat countrymen Robert Garrigus and William McGirt.
Piercy ended on 17 under par, with overnight leader Garrigus only able to card a 70.
McGirt ruined his play-off chances with a bogey on the last.
England's Gary Christian finished tied for 10th on 10 under par after a final round 66, while Open champion Ernie Els missed the cut.
Other than Christian, Fiji's Vijay Singh was the only other non-American in the top 10, finishing tied for seventh after a 67.
Garrigus had started the day on 16 under - one shot ahead of McGirt and two clear of Piercy - breaking a 54-hole record set more than half a century ago by Arnold Palmer.
But his round failed to fire and despite a birdie on 14, he dropped a shot on the par-three 16th.
McGirt moved to 18 under before the turn but two bogies on the final four holes ended his challenge, leaving Piercy to profit from a strong front nine and secure his second PGA Tour victory.
On the European Tour, local hero Bernd Wiesberger shot a final round 65 to win the Austrian Open by three shots, his second European Tour title .
Irishman Shane Lowry and Frenchman Thomas Levet tied for second on 16 under, while third round leader Thorbjorn Olesen dropped out of contention with a 74.
And in the Senior Open Championship at Turnberry, 52-year-old American Fred Couples birdied the final two holes to clinch victory on his first appearance at the event.
CANADIAN OPEN FINAL ROUND LEADERBOARD
- -17: S Piercy (US)
- -16: R Garrigus, W McGirt (both US)
- -14: J Teater, B Cauley, C Kirk (all US)
- Selected others: -12 V Singh (Fij); -10 G Christian (Eng) R Goosen (SA); -9 B Davis (Eng)
