Rory McIlroy closed with a 4-under 66 to finish four shots ahead of Xander Schauffele, joining Tiger Woods as the only players to win the FedEx Cup twice.

McIlroy began five shots behind before the tournament started — he wanted to post the lowest score of anyone in the 30-man field.

He shot 13-under 267, the best by three shots.

The final round turned on the seventh hole with a three-shot swing — McIlroy made a 25-foot birdie, while Koepka lost his tee shot in the trees and made double bogey. There were consecutive two-shot swings on the back nine, and then it was a matter of holding off Schauffele.

McIlroy was four shots ahead until back-to-back bogeys, and he was on the verge of watching his lead shrink to one when he holed an 8-foot par putt on the 16th. Schauffele had to settle for pars, and McIlroy finished with a flourish.

Schauffele closed with a 70 to finish alone in second, which paid out $5 million.

Justin Thomas, the No. 1 seed in the FedEx Cup who started with a two-shot lead, lost his way Sunday morning in the conclusion of the third round when he took triple bogey on the 16th hole with a 9-iron from the fairway. He fell four behind and never caught up. Thomas finished with two birdies for a 68 and tied for third with Koepka, who ended another big year with a pedestrian closing round of 72.

They each earned $3.5 million.

The marathon final day — 31 holes for McIlroy and contenders — began with big promise for a wild chase for the $15 million prize. Four players took turns atop the leaderboard in the first 35 minutes of golf Sunday morning, which included Schauffele’s first hole-in-one of his career with a 5-iron on the 240-yard ninth hole.

The third round had been suspended Saturday after lightning struck a tree and injured six spectators huddled nearby. Police said they were treated and released from medical attention later that night.