Career Highlights

2017 Season

• Valero Texas Open: Overcame a 2-over 74 in round three of the Valero Texas Open with a 68 in Sunday's final round at TPC San Antonio to finish T6 with three others at 7-under 281.
• Shell Houston Open: Entered the final round of the Shell Houston Open leading Rickie Fowler by three stokes, his first-ever 54-hole lead on TOUR. Finished alone in second after an even-par 72 in the final round. Earlier in the week, tied the course record with a second-round 63 to take a six-shot lead heading to the weekend. His 16-under 128 total broke the 36-hole tournament record by one and current course record by three (132). In the second round, made 196'8" of putts, the third most in tournament history. Made six putts outside 20 feet in the second round, a new ShotLink record (since 1983). The runner-up marked his first on the PGA TOUR.

2016 Season

Advanced to the FedExCup Playoffs for the first time in his career on the strength of two top-10s in addition to four top-25s, ending the Wyndham Championship at No. 122 in the FedExCup Standings. Ended his season ranked No. 96.

• The Barclays: One hour after Johnson Wagner fired a final-round 64 (-7) at Bethpage Black during The Barclays, did the same to finish T18 in the opening FedExCup Playoffs event and match the course record at Bethpage Black.
• The Honda Classic: Following his performance at the Northern Trust Open, finished T10 at The Honda Classic, marking the first time in his career he recorded back-to-back top-10s.
• Northern Trust Open: A week after shooting a course-record 60 at Monterey Peninsula CC during the second round of the AT&T Pebble Beach Pro-Am, carded a 6-under 65 to finish T8 at the Northern Trust Open with a 10-under 274 total in his second start at The Riviera Country Club and first since 2012. Had Mike "Fluff" Cowan on his bag.

2015 Season

Finished the Web.com Tour season with 21 starts, one runner-up, one third-place finish, four top-10s, five top-25s and 12 cuts made. Was 43rd in the final priority-ranking order. Closed the Regular Season with two missed cuts and a T34 but wrapped up his 2015-16 PGA TOUR card finishing 22nd on the money list. In May, recorded a pair of T8 finishes, in his home country on the OneAsia Tour.

• Web.com Tour Championship: Finished 65th at the Web.com Tour Championship.
• Nationwide Children's Hospital Championship: Was T61 at the Nationwide Children's Hospital Championship in the Web.com Tour Finals.
• Small Business Connection Championship at River Run: Skipped the Small Business Connection Championship at River Run in the Web.com Tour Finals.
• Hotel Fitness Championship: In the Web.com Tour Finals, opened with a T37 at the Hotel Fitness Championship.
• Digital Ally Open: The next week in Kansas City, fired 67-67-65-65 to place T3 and improve to 17th on the money list.
• Utah Championship presented by Zions Bank: For the second year in a row, finished second at the Utah Championship. Was the only player in the field with four rounds in the 60s at the GC at Thanksgiving Point. Began the final round two shots behind leader Patton Kizzire. Momentarily took the lead after two holes on Sunday. Made a charge on the back nine to finish with a 5-under 67 to force a playoff with Kizzire. Had chances to win in both regulation and on the first playoff hole, but his putts didn't drop. Missed a 25-foot birdie putt on the second extra hole and watched as Kizzire made a 3-footer for the win.
• Albertsons Boise Open presented by Kraft Nabisco: In July, added a top 10 in Idaho. Shot 67-64 on the weekend at the Albertsons Boise Open for a T7.
• Rex Hospital Open: Recorded a T61 and missed four cuts in his next six starts.
• S K Telecom Open: Finished T8 at the S K Telecom Open.
• The 34th GS Caltex Maekyung Open: Finished T8 at The 34th GS Caltex Maekyung Open.
• El Bosque Mexico Championship: In his fifth start of the year, was T21 heading into the third round of the El Boqsue Mexico Championship. Moved up the leaderboard to T6 Saturday on the strength of a third-round 68. A final-round 69 ensured a T6 finish.

2014 Season

Played in 16 Web.com Tour events, making seven cuts. Had one top-10 and four top-25s. Missed the cut in his last five tournaments, including the four Web.com Tour Finals. Finished the Regular Season 64th in earnings. Made three cuts in four Asian PGA Tour starts.

• Thailand Golf Championship: Posted a T29 in December at the Thailand Golf Championship.
• Asia-Pacific Diamond Cup Golf: Played one event on Japan Golf Tour in September, resulting in a missed cut at Asia-Pacific Diamond Cup.
• News Sentinel Open Presented by Pilot: Finished T22 at the News Sentinel Open in August.
• Utah Championship presented by Zions Bank: Season highlight came in July at Utah Championship, where he shot rounds of 67-65-67-68 to T2 with Travis Bertoni and Adam Crawford, four shots behind winner Andres Gonzales. It was his second Tour runner-up (2011 BMW Charity Pro-Am).
• Air Capital Classic presented by Aetna: Finished T22 at the Air Capital Classic.
• Cleveland Open: Finished T18 at the Cleveland Open.
• The Championship at Laguna National: T20 in May at The Championship Laguna was his best outing on the Asian tour.
• Volvo China Open: On European Tour in April, missed the cut in the China Open.
• Maybank Malaysian Open: On European Tour in April, missed the cut in Malaysian Open.
• King's Cup Golf Hua Hin: Posted a T26 in January at the King's Cup Golf Hua Hin.

2013 Season

Made the cut in 11 of 21 Web.com Tour starts and had three top-25 finishes. Missed his last four cuts to drop out of contention for the Web.com Tour Finals, finishing 86th in Regular Season earnings.

• Kolon Korea Open: Won a second consecutive tournament, this time in unlikely, unique circumstances. Trailed by two shots going down the stretch at the Kolon Korea Open, but when rules officials decided leader Kim Hyung-tae had illegally grounded his club (and issued a two-stroke penalty), it dropped Kim into a T2. The second consecutive victory left him with mixed emotions. "I'm a really good friend of [Kim], so at the moment it doesn't feel great. Even though I won the tournament, I just feel really sorry for him. I was actually out [near the 18th green] to celebrate for him," he said.
• KJ Choi Invitational: Shot rounds of 68-69-69-70 at the CJ Invitational Hosted by K.J. Choi and cruised to a five-shot victory in mid-October on the OneAsia Tour. Was tied for sixth through 18 holes at Haesley Nine Bridges GC in his home country of South Korea. Added three more under-par rounds in Seoul to win his first international title.
• Mid-Atlantic Championship: Earned his only top-10 of the year when he T6 at the Mid-Atlantic Championship in early June. Was just one shot off the lead after 54 holes at TPC Potomac at Avenel Farm, but a final-round, 3-over 73 dropped him back. Finish moved him to 59th on the money list, his best position of the year.

2012 Season

Made seven cuts in 30 PGA TOUR starts, highlighted by a pair of top-30 finishes.

• Albertsons Boise Open Presented by Kraft: Made one cut in four starts on the Web.com Tour, a T55 at the Albertsons Boise Open.
• Wells Fargo Championship: Best showing was a T26 at the Quail Hollow Championship, thanks to four consecutive, sub-par rounds.

2011 Season

• U.S. Open: Playing in his first U.S. Open, was T39 at Congressional CC.
• BMW Charity Pro-Am presented by SYNNEX Corporation: Was a playoff runner-up to Garth Mulroy at the BMW Charity Pro-Am. Fired a 2-under 69 during the final round at Thornblade Club to join Mulroy at 18-under par and force the Tour's first playoff this season. Handed Mulroy the win when he missed a short putt for par on the first extra hole. Was making his first career start on the PGA Tour and was attempting to become only the 13th player in Tour history to win in his initial start.

2009 Season

• Ballentine's Championship: Finished runner-up to Thongchai Jaidee at the 2009 Ballantine's Championship.

Amateur Highlights

• Competed in U.S. Amateur Public Links, reached U.S. Junior Amateur semifinals and the finals of the Japan Amateur. Won the Korea Junior. Earned gold medal in the Asian Games.