Thomas mixed nine birdies and two bogeys before hitting his second shot to six feet on the par-five 18th hole and tapped in for eagle to record the lowest round (9-under) in relation to par in US Open history. It would have been the round of the day had Thomas not shot 63. It's a long haul.
Thomas, decked out in shocking fluorescent pink trousers, produced a no less electric performance signing for nine-under 63 to equal the lowest numerical score in a major and the best ever in the 117-year history of the U.S. Open in relation to par.
At a championship that usually leaves most of the field bloodied and battered, only the scoreboard is red this year.
KEY STATISTIC: In 116 U.S. Opens to date, only six players had ever reached 10 under or better. That's for the Quad Cities Open.
Scheffler, it appeared, was on his way to joining Leonard in Longhorn U.S. Open history. For the first time since the world rankings debuted in 1986, the top three players all had missed the cut at a major.
McIlroy was never in the short grass from the 11th hole to the end on Thursday when he opened with a career-worst 78, and he didn't do almost enough in the second round until it was far too late.
This won't be a U.S. Open final round where you can focus in on one pairing and expect the victor to be one of those two. "It's interesting to see where the USGA has gone with the U.S. Open, being a little more friendly than in years past".
"But this one's different because it's soft".
Playing in the final group with Harman will be Thomas, who is almost as small but one of the longest hitters in the game.
That second-place finish earned him $1 million, moved him into the top 50 and secured his spot in both this year's Masters and U.S. Open.
"I think since my dad dropped me off at football practice and told me to not be disappointed if I didn't get to play at all", Harman said, drawing laughs. It's all pretty self-explanatory in terms of what it means.
"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. "Obviously, today I definitely had something to show for it". "I don't know how I'll feel tomorrow".
As has been the case all week at the build-it-and-they-will-come venue nothing could have been further from the truth.
Conditions for the final day in Wisconsin are expected to be more blustery, but Fleetwood added: "I'll be happy if it blows, I don't mind either way".
His problem was getting the ball in the hole with his new TaylorMade Spider Red putter, but he insisted it was the Indian and not the arrow that was to blame as he took 30 putts.
Fleetwood was alongside Reed after a birdie on the first, but Casey tumbled down the leaderboard after following an opening birdie of his own with a triple-bogey on the third. "I just tried to find the fall line".
South Africa's Louis Oosthuizen had looked like being the early pacesetter, the former Open champion going to the turn in 32 and picking up shots on the 11th and 15th, only to run up a double bogey on the 17th.
Koepka had the lead until he turned a birdie chance into a bogey on the par-5 first hole after making the turn.
Rickie Fowler was two behind Harman on 10 under after a four-under-par 68 which kept him firmly in contention. I'm sure I won't sleep in; I usually don't.
"It's just golf. It's frustrating but I don't let it bother me".
"It's going to be weird", Thomas said of his likely emotions. "I needed to hit a lot of fairways, and if I do that, I'm going to play well".
A 338-yard drive off the tee took him to the edge of the green and he got up and down in two for a birdie. "I was excited to shoot 63".
The U.S. Open was only his sixth start this year.
Scheffler won a U.S. Junior Amateur title, but Spieth won two. It can be a dream or it can be a nightmare. "But you still have to golf your ball out there".