He also smashed Australian Adam Scott's record as youngest victor, which the Queenslander set in 2004 aged 23 years, 8 months and 12 days. "However, regardless of me winning this tournament I really have to go to the military service, and I've already decided I'm going to go so I'm ready for that".
"I wasn't doing that well at the beginning of this year, but I'm so excited I can be the champion".
In posted a 3-under 69 for the round, Kim was the only player in the top-10 to card zero bogeys on the day, while the final group pairing of J.B. Holmes and Kyle Stanley finished a combined 13-over par on the day.
If this Dublin punter sees Si Woo Kim anytime soon, he owes him a stack of pints.
Kim's compatriot Bae Sang-moon, another two-time victor on the PGA Tour, lost a legal battle to defer his military service in 2015. While no male Korean golfers were able to crack their way into the top 30 in the world ranking past year, there were five Koreans ranked in the top 10 of the Rolex Ranking, a ranking system for female golfers.
He is just the fourth player to win twice on the PGA Tour before 22.
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It offers exemptions to athletes who win a medal of any colour at the Olympics or gold at the Asian Games but unfortunately for Kim, winning the PGA Tour's flagship event does not bring an exemption.
Kim also soared in the world rankings, jumping from 75th to 28th. On four occasions he wasn't even good enough to break 80, including last month at the Masters, where a second round of 81 saw him miss another cut. Speaking after his maiden tour victory, the 21-year-old has resigned himself to serving his country.
However, after fellow pro Brian Gay discovered a discrepancy in the points allocation for players coming back off medical exemptions, the Tour recalculated his points tally and Poulter was handed a lifeline until the end of the season.
Kim became just the second Asian victor of the Players after his idol South Korean K.J. Choi triumphed in 2011. "That kind of advice actually helped me a lot".
In 2012, just two years after he began playing competitive golf as a middle school student, Kim drew attention by becoming the youngest golfer ever to make it through PGA Tour Q-School.
"So when I was in position the last round, before he actually explained about his experience of being in the leading position. There are some strong winds, and I'm actually enjoying that moment, so I think I was very confident that I could win". It was Kim's second career PGA Tour victory.