Patton Kizzire clinched the Sony Open title following a play-off victory over James Hahn to secure his second PGA Tour success of the season.
The 31-year-old, who finished with a fourth round score of 68, sealed the triumph over six extra holes against compatriot Hahn after the pair completed the final round on 17 under par - a shot in front of overnight leader Tom Hoge - in Hawaii.
Kizzire was tied for second after Saturday's third round, during which off the course a ballistic missile alarm warning was sent by mistake causing a brief panic for players, officials and fans alike, 38 minutes before the Hawaii Emergency Management Agency confirmed it was a false alarm.
The incident failed to shake Kizzire, who also won the OHL Classic in Mexico in November for his first PGA Tour success, as he edged a 3-4 victory over Hahn on the par-three sixth play-off hole to claim the title.
Webb Simpson, Brian Stuard and Brian Harman finished in a three-way tie for fourth on 15-under with fellow American trio Gary Woodland, Ben Martin and Ollie Schniederjans a shot further back.
Scotland's Russell Knox finished in a four-way tie for 10th after a final round 69 saw him come home 13 under par.