Matsuyama tied a second-round U.S. Open record in relation to par with his seven-under score, and his bogey-free 65 could have been even better.
Count former Taylor County and University of Kentucky star J.B. Holmes among those in the mix.
Casey's opening 66 had left him a shot off the pace and he swiftly joined Fowler in the lead with a birdie from close range on the 11th, his second hole of the day, only to bogey the next and run up a triple-bogey on the 14th. Friday's round included five birdies and two bogeys.
"I thought I was on course to do that after being 2-under through two, and didn't work out that way".
"Rickie was up there [and] us three played pretty solid", Niebrugge said. "So you've got to minimize those mistakes, minimize those bogies".
"I'm sure mama's waiting for me to get home so I can help her out", Johnson said of his girlfriend, Paulina Gretzky.
"I drove it great today and I think that was the key to a good round". And I can hit those shots.
The US Golf Association later confirmed the blimp was not affiliated to the tournament. It's just that you've got to keep it in the short grass, out of that fescue, don't make any bogies. Lee Janzen, who shot 73 in 1998 at The Olympic Club when it played as a Par 70. "I got off to a bit of a shaky start and hit a few bogeys". Some of it nearly takes the bombers out of it.
While he was hitting the ball beautifully down those 60-yard corridors in his practice rounds, they narrowed considerably when he was handed a scorecard.
Everyone has to start somewhere, and that's been the case for the last six majors, all won by players who had never won a Grand Slam event before. The top 18 players on the leaderboard going into the weekend have combined for zero majors.
"It always does that", he said. "I like the way this course suits my game". Today really kind of stayed the same. He still had his worst score in a U.S. Open.
McIlroy won the US Open with a record 16-under-par total in 2011, but was a combined 50 over par for his seven other appearances before this week and missed the cut at Oakmont previous year following rounds of 77 and 71. That's more than Johnson can say this week. "I couldn't possibly shoot any higher than I did".
Casey and other early starters were greeted by more challenging conditions than those they faced in the opening round as winds picked up and greens firmed around the links-style layout, making the longest course in U.S. Open history play even longer.
But it was too little too late for the Northern Irishman who remains anchored near the bottom of the leaderboard at five over.
Joining them were British Open champion Henrik Stenson (No. 6), Alex Noren (No. 8), Jon Rahm (No. 10), Justin Rose (No. 11) and Adam Scott (No. 12).
Carnage at US Open as world's top three sent packing
Reavie moved to 4-under 140, three shots back of the lead on a bunched-up leaderboard. "Yeah, it was a bit of a roller coaster ". Day had no answers. "I can't put it any other way other than just there was some good stuff mixed in with a lot of poor stuff".
Ronaldo planning to leave Real
As a result, he has told Madrid of his desire to leave Spain this summer, the report in the Portuguese newspaper said. Ronaldo joined Real Madrid in 2009, after a six-year long career with Manchester United .
London fire: Death toll soars to 30
Mr Magee and his crew avoided falling debris as they battled their way in to the building, only to find conditions worse inside. In Notting Dale, despite local anger, the blaze has united different sides of the community all the same.
DUP negotiations with the Conservatives are 'going well'
She made a self-depreciating joke after John Bercow was re-elected as the Speaker, quipping: "At least someone got a landslide". The Northern Irish border with European Union member Ireland remains a headache for Brussels .