Elsewhere, Maria Dunne (Skerries) led wire to wire to claim the Irish Women's Open Stroke Play Championship.
World No. 1-ranked Dustin Johnson matched his best Players score with a 68 and posted his best 72-hole position with a tie for 12th at 2-under. Rory McIlroy had new clubs in his bag. Defending champion Jason Day and Olympic Champion Justin Rose both carded 8-over-par rounds of 80, while Rickie Fowler went one better at 79, and Garcia at 78. Rickie Fowler, who won the year before, closed with a 79.
Kim, a 21-year-old South Korean, captured his second PGA Tour victory Sunday, becoming the youngest victor in Players Championship history.
Ian Poulter is looking forward to getting back to the revamped Wentworth when he tees it up in next week's BMW PGA Championship.
A scan has revealed the back problem the 28-year-old Northern Irishman had at the Players Championship was a recurrence of a rib injury from earlier this year. There is still no repeat victor in the history of The Players Championship. If you can do that around this golf course, I mean you can outscore everyone.
The PGA Championship is the European Tour's flagship event, while the PGA Tour is a season of tournaments played mainly in the United States.
Poulter, 20 years older than Kim, knew the goods when he saw the leaderboards.
"I wasn't doing that well at the beginning of this year, but I'm so excited I can be the champion".
In this EPA photo, Kim Si-woo of South Korea celebrates after winning The Players Championship at TPC at Sawgrass in Ponte Vedra Beach, Florida, on May 14, 2017.
Kim became the second South Korean to win the event after KJ Choi in 2011 and he said he hoped his victory would help inspire his countrymen to raise their game.
It was Kim's second PGA Tour victory, and his biggest by far.
"The difference between my first victory and this one is that I am now confident I can win a major", he said.
But Choi needed a David Toms three-putt on the first playoff hole to raise his Waterford crystal. His 73 left him tied for second with Ian Poulter.
Poulter, who positioned himself Friday with a 5-under 67, laughed at another bit of pressure he faced in his second round. "From the beginning of this year, I really wished I could be in the top 10 so I could get the ticket to get in, and I'm very proud that I could join this tournament as a representative of Korea and Asia". "I still don't really like the 12th". "[I didn't] want to be passing them on the way back home if I played bad [and missed the cut]. But it was tough to get it close on those closing holes".
Kim will have to do the same unless he can win a major in the next few years.
"I know he hit a couple of wonderful shots yesterday to get himself out of trouble, driver off the deck on 14 was a pretty impressive shot". That card effectively went to waste, and Kim spent the next two years on the developmental tour until earning his card back to the big leagues. At 21, he was the season's youngest victor.
"Because of that experience", Kim said of his previous win, "I could be relieved and I could be very stable".
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