|Second round leaderboard|
|-5 J Spieth (US), P Reed (US); -4 B Grace (SA), D Johnson (US); -3 J Luiten (Ned), T Finau (US), D Summerhays (US), B Martin (US)|
|Selected others: -2 J Day (Aus); -1 S Lowry (Ire), H Stenson (Swe); +1 P Casey (Eng); +2 L Westwood (Eng), J Rose (Eng), M Warren (Sco); +3 P Mickelson (US); +4 L Donald (Eng), R McIlroy (NI); +5 I Poulter (Eng), J Gunn (Sco), C Montgomerie (Sco)|
|Missed cut: +6 M Kaymer (Ger); +7 B Watson (US); +8 G McDowell (NI); +16 T Woods (US)|
Tiger Woods missed the cut at the US Open for the first time since 2006 after finishing the second round 16 over par at Chambers Bay.
The 14-time major winner, 39, had eight bogeys in a six-over 76.
Masters champion Jordan Spieth shot a 67 and he leads with fellow American Patrick Reed (69) on five under.
World number one Rory McIlroy dropped three shots in his last two holes but his two-over 72 and four over total was one inside the halfway cut mark.
Super Spieth shares the lead
Spieth will join Gene Sarazen as just the second 21-year-old to win more than one major if he triumphs at Chambers Bay. He will also become the sixth man, after Craig Wood, Ben Hogan, Arnold Palmer, Jack Nicklaus and Tiger Woods to win the Masters and US Open in the same year.
The Texan has given himself every chance. Spieth started at the 10th and four birdies in his opening eight holes saw him move to the top of the leaderboard on six under before a double-bogey six at the par-four 18th slowed his charge.
He immediately clawed one shot back on the first and finished his round with a birdie two.
As Spieth finished, Reed set out on his second round.
An extraordinary run of four bogeys, two birdies and an eagle in seven holes midway through his round saw him reach seven under before a bogey at the last saw him lose the outright lead.
Out of the Woods?
For only the fifth time in 68 majors as a professional, Tiger Woods will not play in the final two rounds. Much of the damage was done on Thursday, his worst US Open round as a professional.
In Friday's six-over 76, the world number 195 was not as wayward off the tee or as errant with his irons but he continued to miss putts.
There was a tiny reminder of the Woods of old on the par-four 12th with a wonderful bunker shot and putt for birdie but his 156 shots is his highest 36-hole total as a professional on the PGA Tour.
"I hit it a little bit better," he said. "But again I made nothing. I didn't make any putts the first two days.
"I need to get a little better for the Open and I'll keep working at it."
The overnight leaders
Dustin Johnson had three birdies on his front nine and he reached seven under par but a bogey-bogey finish saw the American drop one off the pace on four under after a 71.
Sweden's Henrik Stenson also finished bogey-bogey and that accounted for two of his six dropped shots in a four-over 74 but he remains in touch at one under.
Who else is in touch?
With 20 players at level par or better, and therefore within five of the lead, the tournament is wide open. South Africa's Branden Grace is tied with Johnson after a three-under 67, while Dutchman Joost Luiten (69) is in a group of four a further shot back.
Ireland's Shane Lowry is four adrift after following his opening 69 with a level-par 70 and American Matt Kuchar recovered from dropping five shots in four holes to post a 73 and finish level par.
McIlroy and Mickelson sneak through
Both Northern Ireland's McIlroy and six-time runner-up Phil Mickelson flirted with the cut but made the weekend.
McIlroy eagled the par-four 12th to get to one over but then four-putted the 17th to edge out to three over, before facing a 20-foot putt on the last knowing he had to get down in two to make sure he would be back on Saturday.
Mickelson was four over with two to play after carding five bogeys and no birdies in his opening 16 holes. A birdie on the par-five eighth gave the American breathing space and he safely parred his last.
Best of the Brits
Paul Casey leads the way but he is one over par after a one-under 69. The Englishman had four birdies and three bogeys in a solid round of golf.
The 18th hole proved to be Lee Westwood's card wrecker. The Englishman found a fairway bunker off the tee, took six more shots to get down and his score went from one under to two over in a flash.
He will play the weekend though, as will compatriot Justin Rose, who also had a triple-bogey seven in a level-par 70 to match Westwood's two-over total.
Scotland's Colin Montgomerie briefly flirted with the leaders before successive bogeys on the 13th, 14th and 15th saw his challenge fade. A bogey at the last dropped him to five over, in a tie for 60th and good enough to play on.
England's Ian Poulter and Scot Jimmy Gunn both had 73s to finish on five over.
Missing the weekend
Joining Woods on an early flight home are the likes of two-time Masters champion Bubba Watson, who had six bogeys on his back nine in a 77, Rickie Fowler who ended 14 over after a three-over 73 in round two, and Germany's defending champion Martin Kaymer, who finished six over.
Teenage amateur Cole Hammer is heading back to Houston. The 15-year-old, the third youngest player to tee it up in the US Open, had a 14-over 84 on Friday to finish second last on 21 over.
Of the UK contingent, Northern Ireland's 2010 US Open champion Graeme McDowell bowed out with two 74s while England's Danny Willett, who was two under after nine holes on day one, finished with a seven-over 77 and nine over par total.
The good, the bad, the ugly
Louis Oosthuizen, the 2010 Open champion bounced back from an opening seven-over 77 with the joint lowest round on Friday, the South African's four-under 66 making sure he sneaked under the cut mark.
Jason Day collapsed on the ninth hole after suffering a bout of vertigo. The 27-year-old Australian received medical attention but looked shaky as he completed the hole, which was his last, with a bogey to finish two under.
Lucas Glover, the 2009 US Open winner, signed for a 13-over-par 83. He had four pars, four birdies, four double bogeys, five bogeys and a quadruple bogey in a shocker of a round.
Quotes of the day
Jordan Spieth on the 18th, which was a par five on Thursday and par four on Friday: "Eighteen as a par four doesn't make much sense. There's a group of about 10, 12 guys that can fly it 310 yards that have an entirely different hole to play there. For anybody else you have to hit it in a five or six-yard area. So all in all I thought it was a dumb hole today, but I think we're going to play it from there again, so I've got to get over that."
Lee Westwood was not overly enamoured with the last hole either: "Shame about 18. I know I made triple but it's a stupid par four and a great par five."
Justin Rose is not a fan of the greens, or the fourth hole after taking two to get out of a bunker: "That's not a good golf hole, let's just be honest about it," the 2013 US Open champion said. "I don't mind the ball coming back into the bunker, but when you can't hit a shot because you've got fescue grasses hanging over the top and you can't make a swing...
"I had a five-foot putt on the first and I said to my caddie I don't have the first idea what this is going to do. It felt like outdoor bingo at that point."
And while we're on the subject of the greens, here's Henrik Stenson's summation: "The greens are borderline laughable. It's like putting on broccoli."
However, Dustin Johnson is loving the course. "From the first time I played it I liked it," he said. "It's a lot of fun and you need to use your imagination."
Tiger Woods after a second-round 76: "On golf course like this you get exposed and you have to be precise and dialled in. And obviously I didn't have that."
Ireland's Shane Lowry who is one under at halfway: "It's a bit early to be talking about winning."