By the time the second round was over Friday,
Spieth improved on his first round score with a three-under par 67 on Friday to take the lead early in the day before Thursday's leaders took the course for the 115th U.S. Open at University Place, Wash.
Reed made his way up the leaderboard with a one-under par 69 on Friday, but to get there he needed five birdies and an eagle to overcome six bogeys.
He had a chance to take into the weekend by himself but on the last hole of the day he went bogey.
Stenson shot a four-over par 74 on the round, dropping to a tie at 12th after leading the first round.
Kaymer had both double and a triple bogey through two rounds at Chambers Bay, as he struggled to six-over, missing the cut.
Despite their troubles on Friday,
Mickelson finished three-over with just one birdie Friday. McIlroy saved himself from the cut with an eagle on No. 12, and ended up four-over headed into the third round.
While the drama continues at the top with
Rory McIlryoy, who had been in danger of slipping to that cut line, fired an eagle on No. 12, which has surrendered six in the second round at 284 yards and 11 on Thursday at 317 yards.
For a moment,
Johnson birdied the 506 yard par 4 seventh for his second birdie of the day. That's where Reed went the other direction with a bogey.
Johnson followed No. 7 with a birdie on No. 8 before hitting a bogey-city on the last hole of the front nine.
Johson's misstep allowed Reed to recover with a birdie on No. 8, which gave him three for the round, to rejoin Johnson atop the leaderboard at six-under.
Flirting with the cut line -- projected at five-over -- are reigning
It's early in his second round, but
Reed, who finished four-under in the first round, two-putted to birdie on the second hole and birdied the par 4 fourth hole to initially take the lead before
Other big names struggling with the afternoon tee-times include
Rory McIlroy was two over to begin the day but sits even through six holes with one bogey and one birdie.
Also challenging the top of the leaderboard late in the afternoon is
Johnson, who started at the first hole, and Stenson, who began at the 10th, both railed off back-to-back pars before the 30-year-old's drive found the rough off the fairway at the third hole, and his next shot wound up in the leftside bunker.
Johnson settled for bogey as he dropped to one-over on the round and four-under for the championship.
Yesterday, Stenson had four birdies on the back nine beginning with three in a row starting at No. 14. He's at the 13th hole now.
As the afternoon session gets underway,
Johnson and Stenson have not teed off yet.
One thing the golfers have been dealing with is the length of the course and the usual summer heat.
The projected cut is between 4 and 5 over. The biggest name to miss it will be
Behind the trio at the top are Branden Grace and
At 3 under are Joost Luiten, Tony Finau, Daniel Summerhays, Ben Martin and
Daniel Summerhays seems to be the hot golfer of the day, moving into a four-way tie for first in the second round of the
Summerhays, who tied off on the 10th hole, bogied his first hole but came back with birdies on 12, 13, 17, 1, 3 and 4.
Johnson and Stenson have yet to tee off.
The course is living up to its difficult reputation a little more on Friday as only 25 of the 156 golfers are under par. The cut line hasn't been set yet but it will likely be between 4 and 6 over par depending on how the course plays in the afternoon.
Branden Grace, Ben Martin and Patrick Reed are a stroke back at 4 under. Matt Kuchar is at 3 under. Reed and Kuchar have yet to tee off.
Jordan Spieth is back in a tie for first place as play in the second round of the U.S. Open works its way toward five hours.
Spieth's 5 under ties him with Dustin Johnson and Henrik Stenson, who have yet to tee off.
Spieth's 3 under for the day is tied with several others for the current best round on Friday.
Branden Grace (4 under through 11 holes), Jamie Lovemark (-3, 14), Daniel Sumerhays (-3, 11)
Ben Martin and Patrick Reed join Grace at 4 under, one shot off the lead.
Jordan Spieth took the lead early in the second round of the U.S. Open. And then he played the 18th hole.
But as he went to 18 (his ninth hole of the day) Spieth didn't reach the green until his fourth shot after hitting it in the rough and then a greenside bunker. He two-putted from 25 feet for a double bogey.
Dustin Johnson and Henrik Stenson are leading at 5 under. They tee off after 2 p.m.
Branden Grace (-3 under for the day), Brian Campbell (-1) and Patrick Reed (hasn't teed off) join Spieth at 4 under par.
Tiger Woods chances of making the cut continue to be remote as he is 1 over for the day and 11 over for the tournament.
Amateur Brian Campbell and Masters winner Jordan Spieth have joined the top of the leaderboard in early play in round two of the U.S. Open.
Spieth has birdied three of the first six holes to be at 5 under. He started on the back nine and made an eight-foot putt on the 483-yard 10th hole. He followed that up with 15-foot putt for birdie on the 513-yard 14th hole and a 24-foot putt on the 144-yard 15th hole.
Campbell made birdies when he sank a 23-foot putt on the 403-yard second hole and then made a 20-foot putt on the 207-yard third hole.
He also joins leaders Henrik Stenson and Dustin Johnson at 5 under. They tee off in the mid-afternoon.
Patrick Reed, who has yet to tee off, is alone at 4 under and Ben Martin and Matt Kuchar are at 3 under.
Jordan Spieth, who hasn't done much since winning the Masters, is on the move during early play in Friday's second round of the U.S. Open. He is 3 under after three holes and 1 under for the day. He joins Brian Campbell and Matt Kuchar at that score.
Campbell, the highest scoring amateur so far, parred his first hole of the day.
The leaders, Henrik Stenson and Dustin Johnson at 5 under, do not tee off until mid-afternoon.
Jamie Lovemark is also making a move and sits at 2 under after seven holes, after shooting even par in the first round.
Ben Martin, who started the day at 3 under, dropped a stroke by bogeying the first hole.
Tiger Woods remains at 10 over after a bogey on the first hole and a birdie on third.
Friday's round two of the U.S. Open got off to a sleepy start as most of the leaders are playing in the afternoon session.
Henrik Stenson and Dustin Johnson are topping the leaderboard at 5 under.
Ben Marsh at 3 under tees off around 8:30 a.m. and amateur Brian Campbell, also at 3 under, hits the course at 9:01 p.m.
The only two players in the red currently on the course are
There is a strange curiosity to see if Tiger Woods, who shot his third round in the 80s this year on Thursday, can recover when he tees off at 8:28. He is 10 over par.
In many ways, Chambers Bay lived up to its nefarious reputation Thursday during the first round of the
For others, predictions of six-hour rounds and high scores never came to fruition.
The round starts at 7 a.m. PDT. The final group of golfers are scheduled to tee off at 3:12 p.m.
Be sure to check back here for live updates once the round gets underway.