Koepka's 16-under tied Rory McIlroy for the lowest score in relation to par in US Open history, and Koepka is just the third US Open victor to finish double digits below par (Tiger Woods). After his second shot found the bunker, Koepka made an impressive shot to set up a short birdie putt to provide him with a two-stroke lead.
At 13 under par the American pair enjoyed a two-shot lead over Fleetwood, who had holed from eight feet for birdie on the second before three-putting the next.
"I needed something to go in and see that to build momentum off it, and just carried that over", Koepka said. "You have to measure success in different ways, not just by winning, just because that doesn't happen a whole lot".
ERIN, Wis. - The pats on the back and words of congratulations would have to come later.
Thomas failed to make a birdie on the front nine. It's not the longest hole and one that mitigated Koepka's distance advantage. The Canadian had great things to say about Erin Hills and believes it's a fantastic venue for a major championship. "I've just got to get on the greens and have that cup start to look a little bit bigger". After three all-American seasons at Florida State, the Florida-native chose to start his career in Europe instead of America.
After starring at Florida State, where he was a three-time All-American, Koepka began his professional career on the Challenge Tour in Europe in 2012, and then on the European Tour.
Harman also bogeyed No. 13 to drop back to 11 under. It was Harman's best finish at a major championship.
"I absolutely love this golf course", he said. But at the same time, I don't feel as though I lost the golf tournament.
With the final round finishing up Sunday evening, Wisconsin native Steve Stricker finished -3 for the day and -5 total.
Without much wind until Sunday and with rains during the week softening the greens for long-distance approach shots, scores were lower than expected. "I was 2 over early on, and it's easy to just get wound up or lose hope or just lose it because you want to win the U.S. Open".
Adam Scott was not happy with the direction the organization was headed, and many feared that Erin Hills' fescue would be too hard. Tommy Fleetwood, Patrick Reed, and Si Woo Kim only managed even-par or worse. Having said that, the approach he hit on 15 was, I thought, his best of the day. "This will lead to more good tournaments, I'm sure".
World No. 4 Hideki Matsuyama had the round of the day, making a charge from seven groups back.
Koepka entered Sunday in a three-way tie and a shot behind 54-hole leader Brian Harman. It wasn't almost enough to catch Koepka, but it earned Matsuyama a tie for second place with Harman. - Fowler confident - Rickie Fowler was two behind Harman on 10 under after a four-under-par 68 which kept him firmly in contention.
The pair were sharing a house at Erin Hills but neither one will go home happy. The first couple of holes made a couple of bogeys and felt I rushed.
"That second shot was unbelievable", said Koepka.
It was only the third time in US Open history that the winning score was double digits under par. His best finish in 20 U.S. Open appearances came in the first Open to be held in Wisconsin. But he struggled in the final two rounds. A young fan at Erin Hills asked Xander Schauffele late Saturday if he was a golfer.