Collin Morikawa, 23, wins PGA Championship for first major title

Aug. 9 (UPI) -- Collin Morikawa shot a 6-under 64 in the final round of the 102nd PGA Championship on Sunday at TPC Harding Park in San Francisco to secure his first major title.

The 23-year-old Morikawa won his first major championship in only his second appearance in a major. According to ESPN, the University of California, Berkeley graduate is the third-youngest PGA Championship winner in the stroke-play era -- behind Rory McIlroy (2012) and Jack Nicklaus (1963) -- and the ninth golfer to win the event in his debut.

Morikawa captured his first Wanamaker Trophy with a remarkable shot on hole No. 16. He used his driver on the 294-yard 16th hole to get within seven feet of the cup and drained the putt for an eagle, clinching the victory.

"I was hoping for a really good bounce and got it," Morikawa said. "I hit a really good putt, and now we're here."

He closed with a 64, the lowest final-round score by a PGA champion in 25 years. According to ESPN, his weekend score (129) was the best in the final two rounds of a major by any player ever.

Morikawa finished two strokes ahead of second-place finishers Paul Casey (66) and Dustin Johnson (68). Bryson DeChambeau, Jason Day, Scottie Scheffler, Matthew Wolff and Tony Finau tied for fourth at 10-under 270.

Two-time defending champion Brooks Koepka closed with a 74, his worst round at this year's event. He entered the final round in a three-way tie for fourth but slipped down the leaderboard with six bogeys and only two birdies.

Rory McIlroy finished 2-under par and tied for 33rd, just one stroke above Tiger Woods. Woods fell out of contention earlier this weekend but closed with a 67 to finish 1-under.

Justin Thomas, the world's top-ranked player, also finished 1-under par and tied for 37th with Woods and four others. Jordan Spieth and Phil Mickelson ended in a tie for 71st at 4-over par.