Greg Norman and Vijay Singh are the only golfers to record two rounds of 63 in the majors.
He made the eagle to get his name in the record book Saturday. The bogey there put him at 2 over, and on the par-5 14th, he overcooked a chip shot up the steep hill, which led to another three-putt and another bogey.
"I'm hungry. So I was - honestly, I was a little mad at myself because I could feel I was hungry on 14 and 15, I didn't have anything", he said. But years from now, that's not what Steve Stricker will remember from playing the U.S. Open at Erin Hills, where officials used him as an unofficial adviser in its early years. There were 18 rounds in the 60s on Saturday.
China's Li Haotong, who on Friday became the first player from mainland China to make the cut at a major, bombed out of contention with a 10-over-par 82.
One stroke back are a trio of Americans in J.B. Holmes, Jamie Lovemark and first-round leader Fowler.
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.
Two first-round triple bogeys did him in. Patrick Reed, Paul Casey, Brian Harman and Tommy Fleetwood are at 8 under. "If you're ever going to come from behind in a tournament, I don't think this is a bad option".
"If somebody shoots nine-under from the top few then I'll have to shoot 10, I guess".
"This is the first time I've been in kind of the spotlight". And if his hot pink trousers were not enough, he did it in style.
Koepka had the lead until he turned a birdie chance into a bogey on the par-5 first hole after making the turn.
"The greens were still receptive to good shots, but they were firmer and faster", said Fowler.
"The finish was awesome".
He might need one at this rate.
Thomas raised his putter and walked in the eagle putt to break the record. "It's a major, it means a lot to me", Johnson said. "Obviously, today I definitely had something to show for it".
The U.S. Open has always been defined by its length and narrow fairways, by hack-out rough and concrete, lightning-fast greens.
But he under-hit a pitch into the final green and then got too heavy-handed with the putter and watched his ball race past the flag, off the green and down the run-off area to leave a tricky up and down. Thomas rolled in an 18-footer that went right to left from the edge of the green.
Faced with 299 yards to the hole, Thomas hit a majestic 3-wood that landed just short of the hole before rolling eight feet past. The next one went long, he chipped up to 12 feet and took two putts from there.
"The fairways are massive". "You could see somebody with an fantastic round come from five-plus to win the tournament, if what's projected weather-wise is still there".
"I saw some positives there on the back nine coming in and hopefully I can take them to the Travelers (tournament) next week", he said.
But the work is not done.
With Johnson, McIlroy and Day all missing from the weekend action, all eyes will be on a clustered leaderboard which is dominated by players who have never won a major.