Sean O'Hair beat fellow American Kris Blanks in a sudden death playoff to capture the Canadian Open on Sunday while Adam Hadwin's stirring bid to become the first homegrown winner in 57 years fell short.

O'Hair, without a top 10 finish this season, parred the first playoff hole then watched as Blanks missed from five feet for a chance to extend the playoff as he recorded his fourth career PGA Tour win and first since 2,009.

Blanks and O'Hair both finished the regulation 72 holes at four-under-par 276.

The playoff capped a dramatic afternoon at Shaughnessy Golf and Country Club where Hadwin was trying to become the first Canadian to claim the national championship since 1954.

O'Hair, who started the day three shots behind overnight leader Bo Van Pelt, clawed his way into contention with a two-under-par 68 while Blanks, the first-round leader, shot 69 to force a playoff after rolling in a 10-foot par putt on 18.

Argentine Andres Romero, who rallied on the back nine with five birdies, had looked poised to make it a three-way playoff until a bogey at the last left him out one shot out after an even-par 70.

Hadwin recovered from a disastrous front nine that included two bogeys and a double bogey with a back-nine charge to finish with a two-over 72 and a tie for fourth with Australian Geoff Ogilvy (70) on two-under 278.