“It hasn’t quite hit me yet that I’ve earned a spot to the Masters,” said Henley, who started the week ranked 117th in the world.

Watch: Russell Henley secures an unlikely win in Houston

Americans Luke List and Rickie Fowler shared third on 272, List carding a final-round 68 as Fowler signed for a two-under 70.

Henley began the day four shots off Kang’s lead. He birdied five of his first eight holes and by the time he was done his double-bogey from a bunker at the par-three ninth was barely a blip in his round.

“I tried to go into it with the mentality that I could do it and win it,” Henley said afterwards. “And I started to believe it.”

He had already pulled into a tie for the lead when he strung together three birdies in a row at the 13th, 14th and 15th. He tapped in to take the lead at 13 after lagging his first putt from 98 feet. He drained a 36-footer at the par-three 14th and tapped in again at 15.

Henley added one more birdie before a finishing bogey that made no difference as Kang was unable to find a birdie on the back nine.

“Russell just played it great,” Kang said. “He putted really well, made almost everything. He’s been putting really well since yesterday and last few days, and then I haven’t been putting really well, not like the first two rounds. That was the big key, I think, the putting.”

The third victory of Henley’s career, and his first since 2014, earned him the final invitation to the Masters, the first major of the year that tees off on Thursday at Augusta National.

Fowler, whose third-round charge was derailed by a bogey, double-bogey finish on Saturday, fell out of contention with a double bogey and a bogey in his first four holes.

He had five birdies, including three on the back nine, but by that time Henley was out of reach.

Argentine veteran Angel Cabrera was never in contention, but he delivered the spectacle of the day with his hole in one on the 226-yard ninth hole, his last of the day.