Rory McIlroy lost the Arnold Palmer Invitational by one shot to Kurt Kitayama, who maintained his cool to win.
McIlroy finished on eight under par after a final-round 70, missing a 10-foot birdie attempt on the 18th.
Kitayama, an American, birdied the 17th to reach nine under and parred the 18th to claim his first PGA Tour victory.
“I’ve been wanting to do this for a long time,” he explained. “I’ve been close, and finally finishing it feels amazing.”
Kitayama finished with a level-par 72 that included four birdies, a bogey, and a triple bogey.
McIlroy had five bogeys in his final round, which also included seven birdies as he finished two under par.
The Northern Irishman finished second, tied with American Harris English.
“It’s disappointing,” McIlroy said. “I felt like I gave myself a great chance after a birdie on the 13th and then to play the final five holes in one over par, with this jam-packed leaderboard, isn’t really going to get it done.
“It had been a battle all day. “I felt like I fought hard and just came up one short in the end.”
American Jordan Spieth had four birdies in his first five holes, but he also had two more bogeys as he carded a final round of 70 to finish on seven under.
Defending champion Scottie Scheffler (73), compatriot Patrick Cantlay (68), and England’s Tyrrell Hatton were all on seven under (72).