And two-time victor Ernie Els, who was two under at the halfway stage, dropped five shots in his opening six holes on Saturday.
Johnson put his weekend in jeopardy after missing a 6-footer for par on the par-3 13th. After McIlroy missed the cut, Elkington posted that the Northern Irishman looked "bored playing golf" and added that "without Tiger (Woods) the threshold is prolly 4 majors with 100 mill in bank".
It was the second straight year McIlroy missed the cut at the U.S. Open. Majority had to come from far back going into the weekend, and it was hard to put together two good rounds.
A six-footer for birdie slipped by at the 15th and while he saved par from 12ft at the 16th and nine feet at the 17th, he three-putted from par from just off the 18th and then took four putts from just short of the par-five first, racking up another bogey.
"Not every day you enjoy a round of golf with an eight on the card, but I'm a pretty happy man", Casey said after his round.
At Erin Hills, all Johnson could do was go down swinging on a Friday.
Li found the rough with his tee shot on 18 and hacked it out with an eight-iron, but his ball settled into a deep divot on the fairway, before his third shot bounded through the green into more nasty grass, from where he took six more shots to hole out for a 10-over 82 at Erin Hills. He made two more birdies, including one on the par-3 seventh that put him at 12 under. Granted, it's the first par-72 in a quarter-century, but even the total scores are lower than usual.
"I made a complete mess on the 14th". Fowler's streak ended at 28 holes, however, when he went just long on the 11th hole and had to chip sideways to have any chance of a reasonable par putt.
"As good as I got", he told Spieth, smiling as he walked with him down the fairway.
"It was important to do that. I'll work on the game a little bit, and I'll be ready to play at the British". After all, the U.S. Open has a lengthy history of getting the last laugh and this championship is only at the halfway mark. "Obviously, today I definitely had something to show for it".
"They want par to be a good score", said English, "and this afternoon it will be". 12 and 13 to fall two shots behind Brooks Koepka. "I had a couple of bad drives early in the round and I had to focus on my rhythm and slow things down but as I got into the round it became more natural and I hit a lot of good shots and felt comfortable out there".
Matsuyama vaulted into contention at the U.S. Open with a 7-under 65 on Friday, moving to 5 under and a tie for eighth - just two shots back of the four-way tie atop the crowded leaderboard.
Thomas, decked out in fluorescent pink trousers, was on the move quickly with a birdie-birdie start and had an even hotter finish to his front nine, carding birdies on four-of-five closing holes, including the last three to move to seven-under.
American Chez Reavie also leapt up the leaderboard with a 65 to get to four under - he had eight birdies and one bogey - and missed a 25-foot putt to tie Miller's 1973 record.
Hideki Matsuyama had a solid showing at the Masters in April. He signed for three birdies and two bogeys to finish three under, alongside 2014 US Open victor Martin Kaymer (69) and Austria's Bernd Wiesberger (72).
"It would be great to follow in Justin (Rose)'s footsteps". The Canadian shot a second round two-over 74 but is still in the mix heading into the weekend at two-under par. By the end of a wild and wide-open Saturday, five players were double digits under par.