Instead of the overly cautious approach that normally prevails at most U.S. Opens, anyone thinking about holding the trophy will need to compile a barrage of birdies to have any chance.
The 30-year-old Harman has five top-10 finishes and two victories since joining the tour in 2012, most recently at the Wells Fargo Championship in May. By the end of a wild and wide-open Saturday, five players were double digits under par. Going into the final round, 42 players were still under par. He recovered from one on Friday but not this time, and the joint leader at halfway is now well back after a disappointing 75.
South Korea's Kim will lead the Asian quest for a major on Sunday after Hideki Matsuyama was unable to build on his second round 65.
Champ and Scottie Scheffler are tied at 1 under.
Scheffler plays for the University of Texas, and Champ plays for Texas A&M. He shot 68 and was only three back.
Thomas' historic round included nine birdies, including three straight to finish the front nine.
However, Thomas bettered those performances with a remarkable 63 that saw him become the first player to complete a U.S. Open round in nine under par.
Koepka birdied his first two holes to get to 13 under. "I haven't had a whole lot of success at U.S. Opens so far, but I felt like this course has done pretty well for me".
Spieth had struggled on the greens all week at Erin Hills and both of his bogeys on Sunday came from three-putting, but the former world number one was pleased not to have "thrown in the towel". He still built a six-shot lead through 36 holes, despite hitting his tee shot into the ocean on the 18th hole and salvaging bogey. Sometimes it's just your day, and his calm celebration after draining the shot is the cherry on top. "This went totally against the tradition of the U.S. Open". She thought for a second and replied, "16 birdies". And then he made birdie on the next hole.
The U.S. Open didn't seem to faze him, and he delivered a variety of big shots that led to his sensational finish. But Spieth might take some positives moving forward from his final round after having an up-and-down weekend. And that suggests Erin Hills is too easy.
He told the Golf Channel: "Taking nothing away from nine under par". It features a silhouette of Palmer in mid-stride, tossing his visor in the air. At that point, he was leading by seven shots. Wasn't exactly seeing that, but I'm looking forward to hearing about that when I get back to the house since J.T. and I are staying together. "(There's) no reason to answer that", said Thomas, who is now ranked 13th in the world. Hopefully I do. I'll take it one step at a time. He tees off later Sunday.
Tom Kite carded a closing 72 to win by two shots from Jeff Sluman, with 20 of the 66-man field shooting in the 80s to contribute to a scoring average of 77.2.
Morgan shot 77 and, remarkably, still had the lead at 4-under 212.
Thomas, 24, has never won a major but gave himself a great opportunity of breaking his duck in Wisconsin with a masterful display.
"It means I'm a part of history".
Brian Harman had the lead at 12 under coming into the day.
Thomas had 300 yards to the hole for his second shot at the 18th.
Whoever emerged victorious would definitely have earned it given the conditions which were reminiscent of the final round of the 1992 US Open at Pebble Beach.
The wind is gusting up to 25 miles per hour with the forecast calling for it to go as high as 30 miles per hour in the afternoon when the leaders tee off.
"For one, the greatness of my round is the 63 in the last round of the U.S. Open to win by one", said Miller, now an analyst for the American TV network NBC.
Erin - Rickie Fowler is confident of "getting the job done" after resurrecting his hopes of a maiden major at the US Open on Saturday.
Nearly an inch of rain fell on the course overnight, but scoring conditions were far from easy as the likes of former champion Jordan Spieth and Lee Westwood tried to move into contention. He rolled in a 12ft birdie putt at the 12th and another at the 14th.