Andrew Landry kisses the trophy after winning The American Express tournament in La Quinta, Calif., Sunday. (AP photo)

LA QUINTA, Calif. — Andrew Landry was reeling after blowing a six-stroke lead on the back nine Sunday in The American Express.

“I don’t want to be a part of something like that ever again,” the 32-year-old Texan said.

He regrouped — telling caddie Terry Walker, “Let’s go get this job done, like, quit messing around” — to win his second PGA Tour title with a shot to spare.

Landry broke a tie with Abraham Ancer with a 7-foot birdie putt on the 17th hole, the jagged rock-ringed, island-green par 3 called Alcatraz.

“That was probably the shot of the tournament for me,” Landry said. “Just to be able to go over there and, to that right hole location, and just hold one up and hit a good distance and have a 7-, 8-footer to look at. … Thankfully, it went in and kind of made 18 a little bit easier.”

He closed with a 6-foot birdie putt on the par-4 18th for a 5-under 67 and a two-stroke victory, winning two years after losing a playoff to Jon Rahm at PGA West.

“This is a golf course that has suited me very well in the past,” Landry said. “And just to look back on some of the things that happened a couple years ago and then now, just to be able to finally get it done. I didn’t want to have to go back into a playoff again.”

The former University of Arkansas player won after missing seven of eight cuts to start the season.

“That’s why you just got to keep grinding it out,” said Landry, also the 2018 Texas Open winner. “We all search for these weeks, and the majority of players out here are going to have them, four, five, six times a year and top-10 players are going to have them a little bit more often.”

Trying to become the third Mexican winner in PGA Tour history and first since 1978, Ancer matched the Stadium Course record with a 63.

“All week, really, I hit the ball great off the tee and iron shots, and in the first three rounds, I feel like I didn’t score as low as I should have for how good I hit the ball,” Ancer said. “But stayed patient and today the putts started to fall in.”

Playing two groups ahead of Landry, Ancer birdied No. 16 and 17 and parred the 18th, missing from 35 feet and saving par with a 4 1/2-footer.

He realized he was tied for lead just before teeing off on 17.

“I wasn’t paying much attention to the leaderboard,” Ancer said. “And then that’s when I noticed and I was like, ‘All right, well, we got to make two other birdies.'”