Madison, MS (Best E Casino) - Will MacKenzie won a three-way playoff at the Viking Classic on Sunday to pick up his second career PGA Tour victory.

MacKenzie birdied three of his last four holes to shoot a four-under 68 in the final round, then knocked off Marc Turnesa and Brian Gay in the playoff for his first title since the 2006 Reno-Tahoe Open.

Turnesa, who led after each of the first three rounds, took a double-bogey on the 17th hole and shot a two-under 70, while Gay caught fire in the middle of his round on the way to a 68.

The trio ended regulation tied at 19-under-par 269, and Gay was the only player who didn't make birdie on the first playoff hole. MacKenzie moved on with a two-putt birdie from 59 feet, while Turnesa rolled in an 11-footer at the par-five 18th to also advance.

Back at No. 18 for the second extra hole, MacKenzie hit the green in two again and Turnesa needed three shots to knock his ball to 18 feet. Mackenzie two- putted for another birdie -- this time from 63 feet -- and clinched the win when Turnesa couldn't match him.

MacKenzie's three straight birdies at the 18th earned him the win and a $648,000 first-place check, which vaulted him to 97th on the PGA Tour money list.

"I came here to win and I won," he said.

This week's event was the official start of the Fall Finish -- though it was overshadowed by the Ryder Cup -- and players began the final push to finish inside the top 125 on the money list to earn a PGA Tour card for next season.

Turnesa, with the $316,000 he picked up, moved from 169th on the money list to 130th -- still on the bubble, but looking a lot better. Still, he held a three-shot lead on the back nine Sunday and was looking good to pick up his first career win.

That was, until a ball in the water on the 17th cost him a double-bogey and sole possession of the lead.

"It was just a mistake you can't make and it cost me the tournament," said Turnesa, who had an eagle, four birdies and two bogeys on the rest of the course.

It was the second straight day the Annandale course saw a costly mistake deep into the back nine.

On Saturday, while leading by a shot, MacKenzie took a two-stroke penalty on the 17th hole and made a disastrous triple-bogey to fall behind Turnesa. He trailed by two shots going into the final round.

The feeling he had after the third round stayed with him overnight.

"I went out there with sour grapes in my mouth," said MacKenzie. "And I was just trying to put it in the past."

Bogey-free but unspectacular over his first 12 holes in the final round, MacKenzie was able to make a late run. His birdie at the 13th was followed by a bogey at the 14th, but he went on to birdie three of his last four holes to make the playoff.

In the last twosome with Turnesa, MacKenzie knocked his 90-yard approach at No. 18 within five feet to set up his closing birdie in regulation -- becoming the last man into the three-way playoff.

Steve Allan (66), Bill Haas (68) and Casey Wittenberg (69) tied for fourth place at 16-under 272. Greg Kraft (68) took seventh at 15-under 273.