It opened the door for England veteran Paul Casey (71) to share honours atop a no-frills leaderboard with countryman Tommy Fleetwood, Brooks Koepka and Brian Harman (all 70) at seven-under after the second round at Erin Hills.
Day shot a 75 for a two-day total of 10-over 154, ending at 17 the longest active streak of making the cut in the majors.
"As of right now, I'm one shot back".
On the longest course ever for a major, the cut was the lowest at the U.S. Open since 1990.
"I couldn't possibly shoot any higher than I did", Johnson said.
And for all the birdies and blunders at Erin Hills, the most compelling image Friday came from the parking lot, where one star after another left town after missing the cut.
Fowler has the best chance, even though he lost so much ground over the final two hours.
Johnson, who arrived late at Erin Hills following the birth of his second child on Monday, will now have extra time to spend with his infant son after returning a 73 for four-over.
Both players liked the course, but put their performance down to a lack of execution.
Grief turns to anger in neighborhood near tower fire
Mrs May had received criticism after visiting the scene of the blaze on Thursday, but failing to meet any of the survivors . The Times reported that contractors are thought to have used panels with a polyethylene core for the Grenfell project.
"Show up for the last six holes, anyway", McIlroy said.
"I think me being a little naive has nearly prepared me for this situation", said Schauffele, whose name is pronounced (SHAU-fah-leh). "And I've been very light on competitive rounds this year, and it's just a matter of getting into a good round of golf now". McIlroy was 4 shots off the cut line and Day a whopping 9 shots removed.
Next up is a weekend without most of the biggest names in golf.
Jordan Spieth, the 2015 US Open victor snuck just inside the cut-line at even-par with a 71. He made four birdies over the last six holes to salvage a 71, but he still missed the cut for the second straight year.
"It was a good display, all my own fault, of what can happen if you get out of position on this golf course, which is what I did on 14", Casey said.
Casey discovered how little it takes to make a big number in the U.S. Open - and at this U.S. Open, how a recovery is never too far away.
Champ, a qualifier from Texas A&M, is leading the 156-player field in average driving distance over the first two rounds at 339 yards, and is tied for eighth on the leaderboard, two shots off the pace at five-under-par after Friday's three-under 69.
"After yesterday's round, I received a couple of tips from different people, and it seemed to work well", he said. "It was a bit of a roller coaster". "I guess it's rare you get through a U.S. Open or any major without some kind of a hiccup".