A five-time winner on the PGA Tour, Matsuyama took control of the tournament with a brilliant 65 on Saturday, doing his best work after a rain delay.
Xander Schauffele closed within two strokes after Matsuyama made bogey at No. 15. But Schauffele put one in the water at the 16th and took the first triple-bogey of his major championship career.
That cleared the way for Matsuyama to claim the green jacket. He made a bogey at No 18 but that was enough to hold off Masters rookie Will Zalatoris, who stamped himself as a future star with a 9-under 279.Matsuyama was one shot better at 278.
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