American Rickie Fowler clubhouse leader on -7
England's Paul Casey -6; Tommy Fleetwood -5
Dustin Johnson starts title defence with +3
Rory McIlroy posts +6, Justin Rose level
7,741-yard course with deep rough - longest in major history
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Richard Pryde:, external#bbcgolf, external I am a bit worried as I have Fowler and it is rare to lead from start to finish!! I also have Dufner and Day.
I see your logic Richard. Mr Fowler really has set a mark and raised your hopes. I can't see anyone bettering it on day one.
Anyone else backed the winner this week? Tweet #bbcgolf.
Some of you may be aware of a blimp crashing near Erin Hills. It turns out this was nothing to do with the US Open but yet the USGA have cleared the situation up in a statement.
The pilot is in hospital receiving treatment and was the only person involved.
"Our thoughts and prayers are with the pilot at this time," said the USGA.
Here is the full story if you want a read.
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Spieth (+1 after 14), Reed (-4 after 15)
You have five minutes. No using the internet...
By the way, Patrick Reed drops one to move back to four under. Jordan Spieth needs this to just drop one on his 14th hole of the day. Perfect weight, drops in the right side. Bogey only.
Image source, .Spieth (level after 13), Westwood (-3 after 16) Fleetwood (-5 after 16)
Image source, Getty ImagesJordan Spieth is about to move into ugly numbers as a wayward drive has cost him. His fourth to the par-four fifth - his 14th hole of the day - leaves about 10 feet for bogey.
Lee Westwood looks solid over his ball and he's only missed the green twice from regulation today. Makes no mistake to leave 30ft for birdie on his 17th.
Tommy Fleetwood is having a superb day. That dashing green shirt of his belongs on a man draining 15 footers to save par. That's the stuff Tommy.
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Fancy a chat about all things golf? It's #bbcgolf. I'm already on the caffeine so company would be welcomed.
My pick for the week? Branden Grace. Yours?
Grace is one under after 14.
Spieth (level after 13)
Jordan Spieth is grinding it out a bit, one birdie today as he stands over a 12 footer for par on his 13th hole of the day. It needs to break left... doesn't. Back to par. That would be a decent score if it wasn't for Rickie Fowler blazing a trail like Road Runner.
Spieth clumps one into the thick stuff on the next. Hang on in there young man...
Image source, EPAFowler (-7 after 16)
Image source, ReutersThanks Alex. As it's the US Open I'll kick off with some sort of American slang like cowabunga as Rickie Fowler drains another birdie to make it to seven under. That's right, seven under. I thought this course was supposed to have teeth? It's as gummy as a new born baby right now.
We will be going into the wee small hours tonight and I know you're with me all the way. We will have a quiz or two, some predictions and of course, the action.
With that, I'll welcome a man who is used to a marathon slog, it's Luke Reddy.
Almost feels like I'm introducing him on a What's App group chat there, except we've not all been gossiping about him for the past four hours...
Image source, Getty ImagesHole 18: 622-675 par-five
A show-stopping finale studded with more than 20 bunkers, the 18th tees off from a slight elevation and usually benefits from a following wind, meaning that a decent drive on firm ground could be in the region of 400 yards.
That sets up a tantalising risk-reward option of going for the green, where more bunkers and fescue are waiting to punish errant shots.
Talking of the distance, the 18th at Erin Hills can play up to 675 yards. So let's have a look at it...
The US Open is billed as the toughest test in golf, but this year's edition is also the longest walk.
On top of the 7,845-yard course - the longest in major history - I've heard the stroll between the tee boxes adds almost another mile.
And it seems we could be set for some lengthy rounds.
Hoffman -2 (F)
Charley Hoffman is the current clubhouse leader, he's home in two under.
The American made four birdies in his opening round, but a couple of bogeys pegged him back.
He's one of 24 players currently under par.
Image source, Getty ImagesFowler -6 (15*)
Just to put Rickie Fowler's round in perspective so far, he's one shot off matching a record US Open opening score.
They're playing a 72-par at Erin Hills today.
Not bad, Rickie...
Fowler -6 (14*), Fleetwood -5 (15*)
Image source, Getty ImagesRickie Fowler and Tommy Fleetwood both went on a surge as they hit the turn, clocking up three successive birdies each.
Their scores have settled since, and it's the American who still holds the lead by one shot.
Fowler has successfully negotiated the last three holes in par, with four to play.
Fleetwood is just three from home as he looks to open his US Open campaign with a flawless round.
(All US unless stated)
-6 R Fowler*
-5 B Harman*, T Fleetwood (Eng), P Reed*
-4 B Koepka, E Els (SA)
-3 L Westwood
-2 C Hoffman, M Putman, JB Holmes, B Grace (SA), T Light, M Kaymer (Ger)*, T Light
Selected others: -1 A Cabrera (Arg)*, D Love IV,J Spieth*, Russell Knox (Sco),J Spieth*; E Alex Noren (Swe), RC Bello (Spa) +3 A Rai (Eng), +4 J Rahm (Spa)*
*Tee off from 10th hole
Johnson (+3 after 11)
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Some of you may have noticed Dustin Johnson on his home-made range today. It's not really done him much good as he's three over on his 12th hole of the day. That darn fescue has done him a couple of times.
Willett +7 (12*)
Danny Willett's opening-day scorecard is one to make you wince.
The 2015 Masters champion is currently propping up the pack at seven over par through 12.
The Englishman carded five bogeys on the opening nine and then dropped two shots at the par-four second.
Image source, ReutersPepperell (18:41 BST)
Image source, Getty ImagesYou might have noticed Englishman Eddie Pepperell's name on that list.
He emerged from a torrid spell, in which he was forced to return to Tour School to retain his European Tour card, to make the US Open via the Walton Heath qualifier.
"The last year has been a bit of a struggle and I lost a lot of confidence," Pepperell told BBC Sport's Iain Carter.
"Qualifying for the US Open, having my dad and family there and seeing them smiling, knowing they'll come over to America and have a great time, it was really nice. We are going to enjoy it."
Here's who is heading out in the next hour:
18:30 BST: Jack Maguire, Ben Kohles, Corey Conners (Can)
18:30*: Wade Ormsby (Aus), Oliver Bekker (SA), Kyle Thompson
18:41: Eddie Pepperell (Eng), Chan Kim, Gregory Bourdy (Fra)
18:41*: Brandon Stone (SA), Troy Merritt, Chris Wood (Eng)
18:52: Jhonattan Vegas (Ven), Yuta Ikeda (Jpn), Sean O'Hair
18:52*: Satoshi Kodaira (Jpn), Daniel Summerhays, Alexander Levy (Fra)
*denotes 10th tee start