Finau qualified for the first three majors in 2018, including his first Masters appearance, by making it to the Tour Championship in 2017. He finished in a tie for 10th place at the 2018 Masters, despite dislocating his ankle in the Par-3 contest the day before the first round. In June 2018, Finau finished in 5th place at the U.S. Open after a double-bogey on the 18th hole, his highest finish to date in a major tournament.