This might have been more than anyone was expecting.
Day at least managed to find one positive spin.
Johnny Miller owned the previous best round of eight-under 63 set at the 1973 U.S. Open at Oakmont.
Johnson, who had struggled to a three-over-par 75 in the first round, carded three birdies and four bogeys in a one-over-par 73.
Matsuyama, at number four the highest ranked player still in the field, starts at five-under along with young South Korean Kim Si-woo, amateur Cameron Champ, PGA Tour rookie Xander Schauffele and veteran Brandt Snedeker.
Henrik Stenson. Alex Noren. In the hay left of the 12th fairway, he gouged it out with a 9-iron and watched it roll to 10 feet. A bogey at the extremely hard par-4 fourth hole was the only blip on the front nine and he made the turn at one-over for the day.
"They threw some (tough) pins in there and didn't bother to move tees up or anything today", Hadwin said. DJ looked very disappointed as he was hoping to defend his title while Day and McIlroy seemed more resigned to their fate.
On that occasion, Arnold Palmer, Gary Player, Hale Irwin and Ray Floyd shared the halfway lead, with Irwin going on to win the "Massacre at Winged Foot" on seven over par. Only a half-dozen of them have even experienced Sunday contention in golf's biggest events. He hasn't broken 70 in a round at the U.S. Open since the final round in 2015 when he won the tournament. McIlroy expressed fondness for Erin Hills despite heading home early.
Canadian Adam Hadwin is tied for 24th at two-under par after double bogeying the 17th hole on Friday for a two-over 74.
Justin Thomas managed to stand out in a U.S. Open where par is going out of style. There no longer is a 10-shot rule that would allow anyone within 10 shots of the lead to make the cut.
"Hit a lot of good shots".
"I was upset with the score I had made, but it did not have any effect on my attitude or how I was going to then approach the rest of the round or the next shot".
"I just naturally have done it since I was 15 or 16".
The scores keep getting lower and the names keep revolving atop the leaderboard at the U.S. Open. He had 310 yards to the hole when he hit 3-wood that could have led to big trouble if he went too far long or left.
Sure, he birdied four of his last six holes to salvage a 71 and finish at 5-over 149.
Fowler has the best chance, even though he lost so much ground over the final two hours.
He gave back a stroke on No. 4 when his drive went into the right fescue and his second shot was over the green. "You'd rather think about line of pace", Spieth said Saturday. By the end of the day, Oosthuizen was eight shots back of leader Brian Harman.
Casey laid up in the rough, took two chops to get out of more rough behind the 14th green, and staggered away with a triple-bogey 8 that might have ruined his day at Erin Hills.
"I knew going into the day with the rain we had last night and seeing that the course was going to play probably similar to what we saw Thursday morning when I went out, and if you played well and executed, that birdies were out there", Fowler said.