Irving, TX (My Sportsbook) - Adam Scott sank an improbable 48-foot birdie putt on the third playoff hole to defeat Ryan Moore and win the Byron Nelson Championship.

Scott and Moore headed to the 18th tee for the third playoff hole and Moore split the fairway with his drive. Scott found a fairway bunker off the tee and had to see if his lie would dictate any chance of getting it close.

It did not.

Scott wedged his ball from the sand almost 50 feet short of the flagstick. Moore knocked his approach to 18 feet on the left fringe, giving himself a decent birdie chance.

The same could not be said for Scott, although he defied the odds. His long birdie putt fell into the cup, startling everyone and eliciting a fist-pump from Scott.

Moore had to make his third to extend the playoff. The ball almost fell, skirting the edge, but sliding by. That gave the title to Scott, his sixth on the PGA Tour.

"I got away with one I think today," acknowledged Scott. "I dug it out of nowhere. Obviously I found my range on the third playoff hole. I was hitting it too close on the other ones."

Scott, the overnight leader by three, struggled to a one-over 71 in the final round, but birdied two of his final three holes to get into the extra session.

Moore shot a two-under 68. The pair finished regulation at seven-under 273 and headed back to 18 to begin the playoff.

On the first playoff hole, Moore drove right into the gallery, but got his approach to 18 feet. Scott found the fairway and hit his second to 15 feet. Neither player converted the birdie efforts, but Moore had some cleaning up to do. He made his three-footer and was off to No. 17.

Moore found the back fringe where Scott went in regulation. It left him about 85 feet from the hole, but Scott took an aggressive line at the flag. It paid off since Scott played his tee ball to 10 feet.

Moore putted down inside five feet. Scott had a great chance at the title, but his putt stayed on the left side, much to his surprise. He tapped in for par, then Moore holed his and off to 18 for the third time in about an hour.

It was there that Scott finally made the unlikely putt to earn the playoff win.

Moore collected his fourth runner-up finish.

"A loss is a loss, but I tied for first at the end of the day. That's better than I've ever done," said Moore, who never appeared in a playoff as a professional. "I was just proud of myself for battling around on a tough day in tough conditions."

Bart Bryant only managed a two-over 73 on Sunday, but took third at minus- three.

Nicholas Thompson (67), Mark Hensby (69) and Carl Pettersson (69) shared fourth at two-under 278.

Scott and Moore were the only two with a chance midway through the round on Sunday.

Moore appeared to fall out of things with back-to-back bogeys at 13 and 14. That dropped him to five-under par for the championship, but he answered when Scott faltered.

Scott could not get a 25-foot par putt to fall at the 15th and found himself tied for the lead with Moore, but that didn't last long. Moore tapped in a short birdie putt at 16, then rolled in a beautiful birdie putt from 12 feet at the 17th.

He saved par at the last from three feet and waited to see if Scott could catch him. At the 16th, Scott had nine feet for eagle, but left the putt short. He kicked in the little birdie putt, then two-putted from almost 85 feet for par at the 17th.

Scott hated his drive on 18 because a camera clicked in his backswing. It must not have bothered him too badly because he hammered one down the right side. Scott knocked his second to nine feet and cooly stroked home the birdie putt to force the extra session.

Charlie Wi (68), Roland Thatcher (70), Dudley Hart (73), Brian Gay (72), Charley Hoffman (74) and Kevin Sutherland (74) tied for seventh place at one- under 279.