Last June joined Ben Hogan and Curtis Strange as the only men to retain the US Open since World War Two and two months later claimed his third major at the PGA Championship, his 264 aggregate matching Henrik Stenson’s major record set at Royal Troon in 2016.
At Shinnecock Hills, just his fifth event back after a wrist injury, he edged out Tommy Fleetwood by one after Fleetwood closed with a 63 and at Bellerive he finished two clear of Tiger Woods, who had piled the pressure on with a 64, to go second in the world rankings.
More comfortable was Koepka’s first success at Erin Hills, achieved with a tournament record-equalling 16-under par total that left him four clear of Hideki Matsuyama and Brian Harman.
Later in 2018 became world No 1 when he won The CJ Cup in South Korea.
In 2016 he missed The Open with a torn ankle ligament, but on his return became one of two rookies in Davis Love’s Ryder Cup side at Hazeltine. The former European Challenge Tour golfer earned his second cap in September and then was named PGA Tour Player of the Year for 2018.