Kevin Kisner, who shared the first round lead with Thorbjorn Olesen with 67 each, pulled ahead on Friday morning as scoring continued to be tough at Quail Hollow, a regular venue on PGA Tour, but hosting a Major for the first time.
He is tied with American Kevin Kisner on eight-under par and the duo are two shots clear of third-placed Jason Day.
Defending champion Jimmy Walker of the United States had a miserable day on Thursday, shooting a 10-over 81. If Wiesberger had gone to 4 over, Scott not only would have missed the cut, his PGA Tour season would have been over.
Among those who failed to take advantage was Jordan Spieth, who looks like he'll have to wait another year to try to complete the career Grand Slam. "Just said, 'OK, I'll bounce it up the cart path and see where this goes".
About the featured group of Spieth, Garcia and Koepka - left to right, Claret Jug, green jacket, U.S. Open trophy - they had 14 bogeys Friday.
At 33, he already has taken a long and winding journey through professional golf, going from the hinterlands to the leaderboard of the PGA. He saved par two putts later. That's basically what I said.
He had even needed a pep talk from his caddie after being "bummed out" by a double-bogey at the 11th. One of his dropped shots was on the par-5 seventh, and as he mentioned earlier, "One also one needs to score off the par-fives because you are not going to get too many chances".
Said Mickelson: "It's not a technical issue.I don't feel like I did two years ago, when I was searching for my game.Just not real focused".
It's easy to forget that Rory is still just 28-years-old, and I have no doubt he'll improve as he matures. I have to hit my tee ball where I'm trying to look, and if I don't, I have to find a way to get the ball in the hole the fastest.
On undulating greens, some of the hole locations were extremely hard, with nobody on the leaderboard shooting better than the 68 by Canadian Graham DeLaet, who went six-under in a remarkable four-hole stretch to end the day five strokes behind.
"But the changes to this course mean low rounds are not the 61s and 62s I've shot here in the past, they are 66s or 67s.
You've got to be in the fairway to be able to get it on the green, and who knows, if this rain holds off and doesn't stay around, I can't imagine how much firmer they can get". I love this game. Instead, he's heading in the opposite direction after making bogey on two of the first five holes. "I'll really start worrying about the results with a few holes to go on Sunday".
"There's still 36 holes to go and a lot of golf to be played", he said. The top 70 and ties make the cut at Quail Hollow.