Some of the best short-game shots Jordan Spieth has hit in his young career have been on the final two holes on the Copperhead course at Innisbrook in Palm Harbor, Fla.

Two years ago, it paved the way for him to get his PGA Tour card as a teenager.

He came full circle Sunday by making two improbable par saves to get into a playoff, and then winning the Valspar Championship on the third extra hole by making a 30-foot birdie putt to beat Patrick Reed and Sean O'Hair of West Chester.

"I would rank those definitely in the top five I've ever had given the lies and the scenario," Spieth said.

And the winning putt?

"That's just luck," he said with a smile. "Guess it was my day."

It put an end to an afternoon of back-nine charges, big birdie putts and clutch par saves, the latest chapter in a PGA Tour season that already has featured eight playoffs.

This one was off the charts.

Reed rammed in a 30-foot birdie putt on the 18th hole to cap off a 5-under 66, and then was lounging in a chair waiting to see if anyone could catch him, and then how many would join him.

O'Hair got there with a 30-foot birdie on the 16th hole and a tough par save on the 18th, making a 5-foot putt look far easier than a guy who has now gone 87 starts since his last win.

"I gave myself a chance," O'Hair said.

"That's really all I can do. I played solid all day, played solid all week, and then the playoff was a ton of fun. Two young guys made me feel old."

Spieth looked like he wouldn't make it to the finish line. Tied for the lead, he left his 6-iron well to the right on the par-3 17th and was hopeful of the best. He said to caddie Michael Greller, "Please be a good lie or not on a down slope."

It was a terrible lie on a down slope.

Spieth hit a flop shot that landed perfectly and rolled six feet by the hole, and he saved his par. On the 18th, he hit a fat shot from a fairway bunker some 35 yards short, with a clump of grass behind it and the grain of the grass into the ball. Greller's advice was for Spieth to at least have a chance for par. He hit another flop to 12 feet, and the putt fell on the last turn from the left side of the cup.

"A crazy back nine," Spieth said.

Three behind with six holes to play, Spieth closed with a 2-under 69 to catch a faltering Ryan Moore and win his second PGA Tour title, both in a playoff.

It was his fourth win worldwide - he now has three wins in his last eight starts around the world - to reach a career-high No. 6 in the world and already surpass $10 million in career earnings.

Reed went his final 30 holes without a bogey and made two par saves in the playoff.