Will MacKenzie secured his second career victory with a play-off triumph in the Viking Classic after Marc Turnesa squandered a three-shot lead on the back nine on Sunday.

While the United States carved up Europe in the Ryder Cup, Turnesa did not show the same killer instinct at the at the Annandale Golf Club.

With the eyes of the golf world focused on that battle for international supremacy, Turnesa faltered down the stretch, double bogeying the par-four 17th hole en route to a two-under-par 70 in the final round to force the play-off with MacKenzie and Brian Gay.

All three players finished with a 19-under-par 269, with MacKenzie and Gay each carding four-under final rounds of 68.

A PGA Tour rookie who is ranked 358th in the world, Turnesa was the leader after the first three rounds, only to fall to MacKenzie, who birdied the second extra hole to claim the victory.

Gay was eliminated on the first play-off hole, when he bogeyed the par-four 18th, after MacKenzie and Turnesa carded pars.

MacKenzie's lone PGA Tour victory came in 2006 and his best finish this year was a tie for fourth at the John Deere Classic.

Chad Campbell, who won here last year, competed for the United States in the Ryder Cup this week.

Collated final-round scores (USA unless stated, par 72):

269 Will MacKenzie 70 64 67 68 (Will Mackenzie bt Marc Turnesa and Brian Gay with a birdie on the second play-off hole), Brian Gay 66 68 67 68, Marc Turnesa 65 68 66 70

272 Bill Haas 69 69 66 68, Casey Wittenberg 68 67 68 69, Steve Allan (Aus) 71 68 67 66

273 Greg Kraft 68 69 68 68

274 Brad Elder 68 68 69 69, Dicky Pride 67 67 68 72, Woody Austin 69 69 67 69, David Toms 69 68 71 66, Jason Gore 71 69 68 66

275 Tom Scherrer 69 72 66 68

276 Rory Sabbatini (Rsa) 69 69 67 71, Joe Ogilvie 71 71 66 68, Lee Janzen 67 70 70 69, J.P. Hayes 70 68 70 68, Rich Beem 71 68 65 72, Troy Matteson 69 68 71 68, Shane Bertsch 69 68 71 68, Douglas Labelle 68 70 70 68

277 Tim Petrovic 68 72 66 71, Bo Van Pelt 68 69 68 72, David Duval 69 69 68 71

278 Brad Adamonis 67 71 72 68, Nathan Green (Aus) 67 73 70 68, Paul Stankowski 69 65 71 73, Brett Quigley 69 70 70 69, Dan Forsman 68 70 69 71, Ken Duke 71 71 69 67, Todd Hamilton 68 70 71 69

279 Patrick Sheehan 71 71 69 68, Chris Riley 72 67 72 68, Garrett Willis 68 69 75 67, Bob Tway 71 68 69 71, Justin Bolli 69 67 72 71, Guy Boros 69 72 68 70, Scott Sterling 68 70 68 73, Jay Williamson 67 73 67 72

280 Dustin Johnson 72 69 66 73, John Daly 70 67 70 73, Cameron Beckman 71 70 69 70, Todd Demsey 69 70 71 70, Ronald Whittaker 69 70 71 70

281 Marco Dawson 70 68 70 73, Vaughn Taylor 72 70 67 72, Cody Freeman 74 68 68 71, Tag Ridings 72 69 71 69, Jeff Gove 70 72 72 67, Gavin Coles (Aus) 71 69 71 70, Charles Howell III 71 70 72 68, Kevin Na 75 64 73 69, John Huston 68 69 68 76, John Riegger 70 72 68 71, Spike McRoy 71 67 73 70

282 Robert Gamez 68 73 69 72, Chris Stroud 74 68 68 72, Andrew Buckle (Aus) 67 71 73 71, Notah Begay III 69 69 69 75, Eric Axley 70 69 71 72, Larry Mize 73 69 71 69, Heath Slocum 73 68 73 68

283 Richard Johnson (Wal) 72 69 70 72, Tom Byrum 72 70 67 74, Chad Collins 75 65 76 67, Len Mattiace 70 69 72 72, Craig Kanada 70 68 73 72, Nick Flanagan (Aus) 68 74 70 71, Mark Brooks 73 68 71 71

284 Billy Andrade 74 67 68 75, Y. E Yang (Kor) 71 71 73 69, Michael Letzig 71 68 69 76, Neal Lancaster 70 71 71 72

285 Jeff Overton 73 69 69 74

286 Martin Laird (Sco) 72 69 73 72

287 Kirk Triplett 72 69 73 73, Bart Bryant 72 70 72 73, James Driscoll 70 72 72 73