Greensboro, n.c. — Si Woo Kim had a productive week at the Wyndham Championship. He claimed one tournament record, a share of another — and, most importantly, his first PGA Tour trophy.

The 21-year-old South Korean player closed with a 3-under 67 for a five-stroke victory Sunday. He had a 21-under 259 total at Sedgefield, tying the event 72-hole record set eight years ago by Carl Pettersson.

Kim matched Pettersson by sinking an uphill 14-foot birdie putt on the final hole, then said through an interpreter that he “never expected any course record.”

Kim set a tournament record with a 60 in the second round. He earned 500 FedEx Cup points and $1,008,000 in prize money in the regular-season finale.

Kim became the youngest winner on tour this season, and the second-youngest in tournament history; Seve Ballesteros was 20 when he won here in 1978. Kim also became the eighth player from South Korea to win on the tour — they’ve combined for 18 victories — and the second to do so in Greensboro, joining 2005 winner K.J. Choi.

Luke Donald was second at 16 under after a 67. Hideki Matsuyama and Brandt Snedeker were 15 under, also each shooting 67.