Kim Si-woo of South Korea celebrates after winning the Players Championship at TPC at Sawgrass in Ponte Vedra Beach, Florida, on Sunday.
Kim was the only player among the top 10 finishers not to record a bogey in his final round, during which he birdied three times.
"He played like someone that was doing it for five or six years, like it was just another round of golf", said Louis Oosthuizen, who played the final round with Kim and finished in a tie for second with Ian Poulter.
After his victory in the Wyndham Championship last year, Kim becomes just the fourth player in the last 25 years to win twice on the PGA Tour before the age of 22, following in the footsteps of Tiger Woods, Sergio Garcia and Jordan Spieth.
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"I'm looking forward to seeing the changes that have been made at Wentworth", added Poulter.
This win sees him move 45 places up the world rankings to a career high 28th.
Poulter reduced the deficit to one to get back in to contention, but as Kim scrambled for par on the first two holes of the back nine, the 41-year-old gave away his chance at glory with a dropped shot on the 12th and several missed opportunitiies.
The top 10 at the end of the PGA Tour season automatically qualify for Nick Price's side and Kim can not wait to represent the International Team at Liberty National Golf Club.
He is the second South Korean to win the Players after K.J. Choi in 2011. "They say you need experience to do well at the majors, but if I can study the course beforehand and prepare accordingly, I think it's possible (to capture a major)".
"I feel like I'm still dreaming".
Kim kept a clean card to the end for a 3-under 69 to become the youngest champion in the 44-year history of the biggest tournament this side of the majors. Now that he has more security with his playing status, Kim said he'll take better care of his body and try to play more aggressively when in contention.
"I really wish we could have that benefit", he said. He followed with a short birdie on the 17th and a long par from just off the 18th green. (AP) - Si Woo Kim made Sunday at The Players Championship look like child's play.
Kim, who fashioned three birdies on the front nine and finished his round with nine straight pars, was unflappable on the challenging Stadium Course.