Turned in one of the top rookie performances in the history of the PGA TOUR, with highlights including a victory at the John Deere Classic (one of nine top-10 finishes) and his selection by captain Fred Couples to be on the U.S. Presidents Cup team. Finished the year No. 7 in the FedExCup, with 18 made cuts in 23 starts.

Played in two early season Korn Ferry Tour events, turning in top-10s in both. Fired a final-round 66 at the Panama Claro Championship to T7.

A week later, at the Colombia Championship, opened and closed with 67s to T4 in Bogota.

Finished T2 at the Puerto Rico Open to record his first career top-10 on TOUR in only three starts as a professional (played eight as an amateur). Finished one shot behind Scott Brown, who made birdie-5 on the last hole to claim the win and avoid a playoff. Came close to becoming the second-youngest winner in TOUR history. During the third round, on No. 11, made his first career PGA TOUR hole-in-one.

A week later, kept the heat on at the Tampa Bay Championship. Following a 1-over 72 in the first round at the Copperhead Course, rallied with rounds of 68-69-70 to claim a share of seventh place with six others. The finish was highlighted by a chip-in birdie Sunday at the par-3 17th. With the top-10, earned Special Temporary Member status, making him eligible for unlimited sponsor exemptions for the remainder of the year in his attempt to earn his PGA TOUR card.

Earned his third top-10 finish in his seventh start of the season, finishing T9 at the RBC Heritage.

Local favorite finished T7 in his first start at the Crowne Plaza Invitational at Colonial. The last player to win the event in his first start at Colonial was Sergio Garcia in 2001.

Shared medalist honors at the U.S. Open qualifying event at Dallas' Lakewood CC in early June. Tied with Edward Loar and Matt Weibring at 8-under 134. Shot rounds of 67-67 to earn his second consecutive U.S. Open invitation (T21 in 2012).

Notched his fifth top-10 finish of the season, with a sixth-place effort at the AT&T National. At 7-under, shared the lead at the midway point.

Made history at the John Deere Classic when, at age 19 years, 11 months, 18 days, became the youngest winner on the PGA TOUR since Ralph Guldahl won the 1931 Santa Monica Open at age 19 years, 2 months, 4 days. Since 1900, is only the fourth player under age 20 to win on TOUR. Win came in 24th career PGA TOUR start, his 16th as a professional. Birdied his last three holes in the final round, highlighted by a holed 45-foot bunker shot on the 72nd hole to force sudden death with defending champion Zach Johnson and David Hearn. Won with a par-4 on the fifth extra hole (No. 18). With the win, earned full membership status on TOUR and became eligible for the FedExCup Playoffs. Had 614 Non-Member FedExCup points added to the 500 points earned for the win and moved to 11th in the FedExCup standings. The win also earned him the last invitation into The Open Championship at Muirfield.

Lost to Patrick Reed in a playoff at the Wyndham Championship when Reed made a birdie-3 on the second extra hole (No. 10). On the first playoff hole (No. 18), he drained a putt from 26 feet to save par and force a second extra hole. Reed had a chance to win on the first playoff hole from just over 7 feet but missed.

Highlighted by a career-low 9-under 62 in the final round, finished T4 at the Deutsche Bank Championship, five strokes behind Henrik Stenson. It equaled the lowest final-round score in the 11-year history at TPC Boston (Charley Hoffman in 2010). The performance also marked his eighth top-10 finish of the season.

Was picked by U.S. team captain Fred Couples for his first Presidents Cup team. Became the first rookie to play for the U.S. team in the biennial event. Won two matches and lost two in his initial Presidents Cup appearance playing for the U.S. team.

FedExCup Playoffs season included a T19 finish at The Barclays, T4 at the Deutsche Bank Championship, T16 at the BMW Championship and T2 at the TOUR Championship by Coca-Cola. The latter included an electrifying 6-under 64 in the final round at East Lake, leading to a seventh-place finish in the FedExCup, the best performance by a rookie. Became the lone rookie and the youngest in TOUR history to qualify for the event (20 years, 1 month, 26 days).