South Korea's Kim Joo-hyung claimed his first victory on the PGA Tour after posting a nine-under-par 61 on Sunday to win the Wyndham Championship.
Kim, 20, becomes the second youngest winner on the PGA Tour since 1932.
Despite opening the tournament with a quadruple bogey, he finished five strokes ahead of compatriot Im Sung-jae and American John Huh in North Carolina.
"I stayed very patient this week," Kim told CBS.
"Instead of getting angry and depressed I stayed in the moment and I can't believe I won with a quadruple bogey on the first hole.
"Hopefully that doesn't happen again but it's definitely a week that I will remember forever."
Kim played Sunday's opening nine holes in 27 strokes, tying the second-lowest nine-hole score in tour history.
His victory - the first on the PGA Tour by a player born in the 2000s - means he joins the PGA Tour as a full member, having been playing since mid-July on a "special temporary membership". It also sees him added to the FedEx Cup standings in 34th place, bumping England's Matt Wallace out of the play-offs by a single place.