He became just the third player born outside the United States to win on the PGA Tour before age 21, joining major champions Seve Ballesteros and Rory McIlroy.
Joaquin Niemann became the first player from Chile to win on the PGA Tour, shooting a 6-under 64 on Sunday for a six-stroke victory in A Military Tribute at The Greenbrier.
"Just unbelievable. Never been a better moment", said European captain Catriona Matthew, whose contentious decision to choose Pettersen as one of her wild-card picks paid off.
"I can't wait to go back home and celebrate with my friends".
While eight players already qualified for the International Team that will play the USA team in December at Royal Melbourne in Australia, Els will choose the remaining four team members the week of November 4.
"Being on the Presidents Cup is just a dream", Niemann said. "I was in a really good mindset". It's going to be tough, but this win helps to get a spot.
Werensky finished No. 126 in the FedEx Cup standings last season, one spot from qualifying for the playoffs. He was the world's No. 1 amateur in 2017 when he received his first-ever sponsor's exemption and tied for 29th.
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In 2018, he improved to a tie for fifth at the tournament.
Niemann said the resort's dozens of amenities have steered his mind away from the pressure of golf.
"My game was feeling great and mentally I was awesome".
Niemann is the first third-spherical chief to purchase at The Greenbrier since its debut in 2010. I was just trying not to think of anything else. "My caddie made me laugh to try to forget about it. The last couple of holes I was feeling great".
An emotional Niemann, who at 20 years, 10 months and eight days, is younger than both Seve Ballasteros and Rory McIlroy when they won their first Tour titles, told Sky Sports: "It's just incredible".
Sebastian Munoz of Colombia shot 66 to tie for seventh with seventh with rookies Scottie Scheffler, who had a 69, and Robby Shelton, who finished at 70, while Viktor Hovland of Norway, another rookie, posted a 66 to tie for 10th with Matt Jones of Australia, who wound up a 66, and Mark Hubbard, who came in at 67.
Hoge fell short in another chance at an elusive first win.
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A USA official said all options, including a military response, were on the table, but said no decisions had been made Sunday. USA gasoline and heating oil similarly were up over 8% and 7% respectively before markets opened in NY .
The victory in the PGA TOUR season-opener did more than put Niemann at the top of the FedExCup points list and double his bank account, too.
Hoge fired up with birdies on five of his first eight holes but three bogeys in his next seven holes ended his threat.
"A couple bad shots I would like to have back, but it was a good week and good way to start the year", Hoge said.
After rolling in a 26-foot putt for his second birdie of the day at the 10th, he made his lone miscue, finding the rough off the tee at the 11th on the way to a bogey.
There would be more bursts of joy down the stretch.
"I love this place and I've played really good golf here", Niemann said.
After the morning foursomes were shared 2-2 on the second day at Gleneagles, the US won the tense afternoon fourballs 2 1/2-1 1/2 with three of the matches reaching the 18th hole and the last match finishing on No. 17.
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Returning from the first film are Jai Courtney , Joel Kinnaman , Viola Davis , and Margot Robbie . That role will now be played by Idris Elba; Reid is actually playing his character's daughter.
He began his final round with four consecutive pars before making a birdie putt from just inside 8 feet on No. 5.