Shane Lowry finished with a one-under-par 69 at Southern Hills.
Justin Thomas took victory in the second golf major of the year last night.
He beat Will Zalatoris in a three-hole play-off to win the US PGA Championship.
Both players finished at five-under-par at Southern Hills, with Thomas' total of two-under in the play-off enough to take the title.
Rory McIlroy was in eighth on two-under, with Seamus Power one shot further back.
Shane Lowry shot one-under-par in the final round, to finish two-over-par for the tournament, leaving him in a tie for 23rd.
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