Sam Burns shot a final-round 67 to emerge from the pack and win the Sanderson Farms Championship in Mississippi.
The American picked up four shots on the back nine to win his second PGA Tour title in 2021, following victory in May's Valspar Championship.
Burns finished one shot clear of Nick Watney and Cameron Young on 22 under par.
"It hasn't really set in yet," said the 25-year-old. "I'm still looking out there at the golf course trying to figure out what happened."
SG: Off-the-Tee: 1st
— PGA TOUR (@PGATOUR) October 4, 2021
SG: Tee-to-Green: 1st
SG: Approach-the-Green: 2nd@SamBurns66 put on a ball-striking clinic @Sanderson_Champ. pic.twitter.com/6XeRdtfmqY
What happened was a stretch of four birdies over five holes on the back nine to bring Burns as low as 23-under for the tournament.
He got to within eight feet for birdie at the 11th, drained a 13-footer at the par-three 13th, left an eagle putt inches to the right at the par-5 14th and had a tap-in birdie at the 15th.
A bogey on Burns' last hole didn't do enough damage to his advantage over the field.
Burns did his best not to worry about how the rest of the field was scoring.
"I didn't really look. I made a comment to Travis [Perkins, his caddie] on the par-three, 13, can't remember what I said, but he kind of snapped me back into it, back into what we were trying to do," said Burns.
"He was great all week and just keeping us in the moment and keeping us focused on our process."
Watney had a bogey-free card with seven birdies, including a 25-foot birdie putt on the 14th to make a brief run at Burns.
Sweden's Henrik Norlander fired the round of the day, an eight-under 64 featuring an eagle and three birdies on his back nine. He drove the 14th green in two and drained a 40-foot putt for eagle.
His round lifted him into a tie for fourth with American trio Hayden Buckley, Andrew Landry and Trey Millinax, while overnight leader Sahith Theegala shot a 71 and fell to a tie for eighth.
