Sixty-eight players made the cut, with former champion Webb Simpson, former Masters and British Open victor Zach Johnson and former PGA champion Keegan Bradley all making it on the number.
Taking the national championship to Erin Hills was a gamble by the USGA, which will revert back to more familiar venues such as Winged Foot, Shinnecock Hills and Pebble Beach once this U.S. Open concludes. Jordan Spieth was even par through 12 holes and going nowhere.
Jamie Lovemark, Rickie Fowler and J.B. Holmes, meanwhile, are a shot further back from the leaders.
Miller, whose 8-under 63 came in the final round, and Jack Nicklaus (1980, Baltusrol) are the only players to shoot 63 in a U.S. Open and win.
Thomas, 24, charged into first place with the aid of nine birdies and a wonderful eagle at the 18th, but will begin Sunday a shot behind Brian Harman, who subsequently took over at the top of the leaderboard.
Also at 11-under (205) are Brooks Koepka and Tommy Fleetwood, who each shot four-under 68s. But after a blistering 7-under 65 to start the tournament, Fowler posted three straight bogeys on Nos. He's within striking distance at 10-under 206, two shots off the pace.
"It's going to be a really cool day for someone tomorrow", Fowler said.
"I hadn't been out of position all day and suddenly I was staring double bogey in the face".
"Yes, there are times I would have rebounded like that, but maybe not as calmly". While the course looked to play into all of DJ's strengths, he never really got into a rhythm.
If his hot pink trousers were not enough, Thomas finished in style. Koepka had the outright lead with four holes left in his round before a bogey on the par-3 sixth hole. "We're in a good spot".
It was the 31st score of 63 in major championship history.
"The finish was awesome".
"I'm not sure if it was the trousers", Thomas said.
He might need one at this rate.
It clearly was a good day for scoring at Erin Hills, which was softened by an overnight rain.
But Thomas is no stranger to records.
"The majors have a different feel and sound to the roars and to hear the crowd go insane when I holed that putt on 18 was really cool", said Thomas, whose back-to-back wins in Hawaii in January included an opening 59 in the Sony Open.
"It's been the best preparation going into a major, I felt like, in my career, which is playing in majors and knowing what I needed to do to prep for a tournament such as this", Day said. "It was downwind to where I knew if I hit it solid, I could definitely get it there".
The Kentucky native became the youngest player to shoot 50 on the US PGA Tour during the first round of his Sony Open victory in January. Much like Johnson, it takes a lot to get him excited - even a share of the 36-hole lead at the U.S. Open. He bogeyed the 11th, 12th and 13th holes and missed a short birdie putt on the par-five 14th. Turns out hitting the ball as hard as you can isn't the be-all and end-all of golf after all!
After hitting his drive into the rough on the 17th hole, Hadwin did well to get his second shot up by the green.
"It's similar-type stuff - low round and history stuff, " Thomas said. "When you give us soft greens, good greens and not much wind, you know there are going to be some good scores". "But I'm a pretty happy man".
But the work is not done. None has ever won a major, and neither have the next 14 players behind them.
And then there was Tommy Fleetwood, a name not many in the USA will be overly familiar with.