D. Johnson, Day, Spieth & Grace all joint lead on -4
Holmes & Lowry card -1
McIlroy, Rose & Poulter finish on +4
Use the audio icon to listen
Jay Townsend
Former American professional golfer on BBC Radio 5 live
Jordan Spieth may be clear at the top of the leaderboard but former Jay Townsend thinks there is still a long way to go.
He said: "Especially on this golf course when just a bad bounce or a little mental lapse can lead to a double bogey. There is nothing in three shots."
Jordan Spieth and Patrick Reed aim their second shots into a fourth green that is banked like a Daytona corner.
Jordan Spieth lands closer to the flag. But that is only half the story round Chambers Bay.
It is Reed who ends up with the shorter putt as his approach - further up the sloped green - runs back down past Spieth's ball and to within eight feet.
Image source, Getty ImagesDustin Johnson's par putt on four is not feet or yards, but inches and millimetres.
It just won't stay down though, popping out and up like fat off off a hot pan.
A groan from the crowd and similar from Johnson himself.
He slips back to three under in Spieth's slipstream.
Northern Ireland's McIlroy was also asked on BBC 5 live whether his putting or the Chambers Bay surfaces have checked his progress.
He said: "Both. I missed a few, obviously the greens aren't perfect but then it gets into your head, and I started making tentative strokes, but more me than the greens."
The 26-year-old added: "Every year the US Open is frustrating, apart from 2011 (the year of his win in Maryland).
"I came off and said to JP, (McIlroy's caddie JP Fitzgerald) thank god I have got one of these. I am glad I have got my name on the trophy."
World number one Rory McIlroy is four over after a level-par 70 today but hasn't ruled out his chances of winning a second US Open title.
The 2011 champion told BBC Radio 5 live: "Maybe. Depending on the guys today, if I can go out there, get to even for tournament you never know what could happen.
"I need something spectacular tomorrow. If I have one of my best ever putting rounds I have a chance."
Image source, EPA"You used to be the future once."
One of the great House of Commons put-downs , externaland Phil Mickelson's might be feeling the sting of David Cameron's zinger.
While new American great hope Jordan Spieth is tearing up trees, Mickelson is finishing up with a bogey on 18 to finish on a seven-over 77. He is 10 over overall and his wait goes on for at least another 12 months.
Patrick Reed comes close with his birdie punt, just as he did with his bogey attempt on the previous green.
But close don't climb the leaderboard.
He taps back for par. But he is playing in the shade of a virtuoso start from Jordan Spieth
The gallery's applause is almost sympathetic.
Image source, Getty ImagesOh my!
Jordan Spieth has the momentum of one of the frieght trains that comes trundling through Chambers Bay.
Another whopping putt sinks south and he has picked up another shot.
Reed to follow from closer in.
Image source, Getty ImagesTee shots at par-three third and both Jordan Spieth and Patrick Reed are safe and sound off the pegs.
Spieth has a tricky uphill putt for his birdie, Reed is a little close.
Right, time to take stock.
This is what the top of the leaderboard looks like now. Dustin Johnson and Branden Grace are now the closest in pursuit of Jordan Spieth.
-6: Spieth
-4: D. Johnson, B. Grace
-3: J.Luiten, P.Reed
Image source, ReutersOn the other hand.
Jordan Spieth is the Jekyll to Patrick Reed's Hyde. His putting is touched with greatness right now. He cosies a 15-foot birdie putt right up to the hole, judging the right to left break perfectly. The ball tipples in to move him to six under.
Reed almost salvages a bogey. But his long-ranger stays up. A three-stroke swing in the leading group.
Oh dear Patrick Reed.
He has only a couple of yards of run-off to land the ball on with the flag close to the fringe.
But he has shaved too much off his attempted escape from the back of the bunker. He lobs up the ball high, but not far enough and it plunges back into the sand.
Is it plugged? Reed digs it out if so, but that is his fourth shot and he is looking at a double bogey here.
Image source, Getty ImagesJason Day is looking queasy as a ferry passenger, smiling weakly between some deep, deep breaths.
He only really looks comfortable standing over the ball and a solid par putt on five disappears. He is still level par.
Jordan Spieth's second on two is into the heart of the green. Patrick Reed, with a hint of rough to deal with, is less accurate, running up into the bunker.
USGA executive director Mike Davis, the man responsible for the Chambers Bay set up, has responded to criticism of the greens.
"It wouldn't be a US Open if there wasn't a little muttering," he said, adding the putting surfaces are "better than they look".
He says the mixture of fine fescue and poa annua grasses leave them looking splotchy, and that the poa annua tends to get bumpy later in the day.
He insists a lot of it "is your eye telling you it doesn't look like it's going to be smooth".
The leaders are putting as carefully as if the greens were ice-covered concrete.
Jordan Spieth's tentative prod disappears down for a par on the first first, following Patrick Reed's trend. Onto the second...
Image source, ReutersRory McIlroy added a new vegetable into the mix when describing the Chambers Bay greens after a level-par 70 to stay four over.
The world number one, who missed more than half a dozen makeable putts, said: "I don't think they're as green as broccoli. I think they're more like cauliflower.
However, he diplomatically added: "They are what they are. Everyone has to putt on them. It's all mental. But it is disappointing that they're not in better shape.''
-5 J Spieth (US), P Reed (US); -4 B Grace (SA); -3 D Johnson (US) J Luiten (Ned), JB Holmes (US).
Selected others +1 P Casey (Eng) 8; +4 McIlroy (NI) F, I Poulter (Eng) F ; +5 J Rose (Eng) 11; +7 C Montgomerie, L Donald (Eng) F, (Sco) F, L Westwood (Eng) , +10 P Mickelson (US) 16.
For a full leaderboard, click this way, external.
Image source, Getty ImagesYou are feeling a little groggy, trying to keep your head together after a bout of vertigo yesterday and your so-called supporters do this.
Let's hope Jason Day doesn't spot three giant copies of his own face bobbing around behind the rope.
The Australian has dropped another shot with a bogey on four setting him back to level par.
Former England cricket captain Michael Vaughan on Twitter:
"Officially the worst ever #USOpen Course of all time.....#Fact"
Image source, Getty ImagesSo, Jordan Spieth and Patrick Reed get their rounds underway with their lead at the top of the standings still intact.
Not the best opening shots, both spraying their tee shots left and into the wild and straggly stuff.
An interesting stat from the Golf Channel's Justin Ray., external
"This is the fifth time Spieth/Reed grouped together on PGA Tour last 2 seasons. Cumulative scores in those rounds: Spieth -24, Reed -4."