Johnson was hitting it so well that he appeared to be safe even when he was on the cut line.
McIlroy however, who is returning from a hip and back injury, put a fearless face on his second consecutive missed cut at a US Open following his exit at the halfway stage in 2016.
And then, the old McIlroy kicked into gear and finished with a flurry of gained shots as he kept the ball in play off the tee and proved majestic with his mid-irons to set up several birdie chances.
Casey chopped his way to a triple bogey, only to respond with five straight birdies that carried him to a 1-under 71 and make him the first to post at 7-under 137.
No one has accomplished such a feat since Bobby Jones swept the USA and British Opens and Amateurs, the four biggest events of his day, in 1930. The previous record was three over.
McIlroy's pre-tournament comments proved disappointingly accurate after he had predicted that anyone who could not hit the wide fairways " might as well pack your bags and go home".
Despite that strong start, Fowler found himself in second place when Koepka - who began the tournament with a 67 - birdied four of his first seven holes after starting on the back nine to reach nine under. [On Thursday] I was a little anxious and that caught up with me as the round went on.
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We are playing good teams as well, and we were clearly superior in the second half, and we won the game physically and with a certain determination.
"A little disappointing to end with the double on 17 but I started hitting it a lot better on the back side", Hadwin said minutes after his round.
"It was a good display, all my own fault, of what can happen if you get out of position on this golf course".
A 94-year-old man died Friday afternoon while watching the U.S. Open at Erin Hills, the USGA said. After shooting a 3-under 75 to finish at 10 over for his two rounds at Erin Hills, it was all Day could muster. "I did the work, looked at the golf course, made sure that I could actually play and visualize the golf course". "I have no idea how the weekend is going to go, no one does".
"But I think at the end of the day, it's competitive rounds and getting the card in my hand".
"I fought well on the back nine", Lowry said. He twice has been sidelined this year due to a rib injury, and he had played just the Players Championship since the Masters.
There were so many names bunched into contention Friday at the U.S. Open that it wouldn't have been completely surprising had the leader board suddenly showed Aaron Rodgers, Giannis Antetokounmpo or the cart driver who almost rammed into the back of the other cart near the third hole.
"I'm optimistic with where my game is", he said. Even though he hasn't won since THE PLAYERS Championship in 2016, he had been playing better of late, finishing second late last month at the AT&T Byron Nelson. At Erin Hills, the reviews have been mixed, but there's no denying that the course has made an impression. "I can't put it any other way other than just there was some good stuff mixed in with a lot of poor stuff". The triple on the 14th, his fifth hole, was followed by a bogey on the 15th, and Casey seemed in freefall.
He said: "I showed up for the last six holes, anyway".
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