Joint leader Scott Piercy taps in for par on the 14th, before Graeme McDowell, the 2010 champion, pulls himself back to level par with a birdie on the 11th.

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Sergio Garcia looks well placed in the middle of the fairway on the par-five 12th, but then dumps his next shot into the middle of the bunker.

Better though from Dustin Johnson, who has a 30 foot attempt for a birdie on the same hole.

Annika Sorenstam, one of the most successful female players in history, has just posted the following picture on Instagram of Rose, Mickelson and Stenson at the first.

Finally something to cheer about for Jason Day. He does well to chip his way out of the rough at the ninth to leave a simple putt for birdie.

One of the most popular players at Oakmont is definitely Phil Mickelson and he gets a huge cheer from his fans as he birdies the 18th.

He started his round at the 10th, but halfway round he is on one under and in tied seventh.

So what can we tell you about Scott Piercy, who has just moved into a share of the lead?

Well, he's 67th in the world rankings, he has three PGA Tour wins to his name and his best performance in a major was tied fifth at the 2013 PGA Championship. His best effort at the US Open was tied 51st in 2011.

Meanwhile, Jason Day is in the thick, nasty rough on the edge of the ninth green. He looked away in disgust as soon as he hit it. His round is going to take some saving.

Image source, EPA

Jason Day is having one of those days when you just want to start again. It is all going wrong for the world number one, who bogeys the eighth after a double bogey at the seventh.

The world's best player is on four over after eight holes.

But Sergio Garcia is having a better time. The Spaniard was two over after three, but is now two under after 11. A stunning putt, left to right down the hill, leaves him celebrating.

Meanwhile, Scott Piercy taps in at the 13th to move to four under, and now we have joint leaders.

Image source, Reuters

Two-time US Open champion Ernie Els is having a great day. He won the tournament in 1994 and 1997 and could he triumph 19 years later?

Birdies at the third and seventh have helped him to two under.

Well, just as I was typing he was having a great day he goes and drops a shot at the ninth, back to one under, which is tied sixth at the moment.

The latest match at Euro 2016 has just begun with the Czech Republic taking on Croatia.

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A long birdie putt for Justin Rose on the 17th, but it drifts right. He is still well placed and should remain level through eight, which he does.

Phil Mickleson then produces an almost carbon copy of Rose's attempt - also swinging it to the right. 

Rose, Mickelson and Stenson still all level. Steady, but certainly not spectacular.

Angel Cabrera is having an eventful day. He is nearly out of bounds on the ninth, but recovers to get himself back on track. He is on one over, but having to do a rescue job on many holes.

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Phil Mickelson turned 46 yesterday and the crowd at the 16th green sang 'happy birthday' to the American.

But there is no doubt what he really wants for his birthday though - to get his hands on the US Open trophy.

Remember, this is the one major he has not won with six agonising runners-up finishes. Is this finally his year? He started today with a bogey at the 10th, then followed that with a birdie at the 11th, before five successive pars.

At the moment we have 32 players at par or better so far. The soggy course is undoubtedly the major reason. When Angel Cabrera won here in 2007, his winning score was +5. There is a brisk breeze in Pennsylvania and that is drying the course out and that could spell fun and games for the players. And us.

Image source, Reuters

The sight no golfer wants to see. The ball plugged deep in the bunker. But that is the situation facing Australian world number one Jason Day on the par-four seventh.

The next sight no golfer wants to see, is your attempt to get out of the bunker hit the top of the bank and then roll back into the sand. A double bogey for Day and he drops back to three over.

Image source, Reuters

What a start for the Republic of Ireland's Shane Lowry, whose 68 sees him on two under and currently in tied fourth place.

"It feels really good," Lowry tells Sky Sports. If you had told me I would shoot 68 I would have probably laughed. It is not as difficult as it has been this week but it is still difficult.

"I was pretty happy standing on the last tee and I played the last well. I missed a few greens earlier on yesterday and managed to get a few up and downs.

"This week is about trying to keep the doubles off the scorecard and you just never know what can happen. If I'm out late on Sunday afternoon I know I can compete, no matter who I come up against. If my head is on and my mind frame is good I can compete."

Here's how it stands at the top:

-4: Andrew Landry (18)

-3: Lee Westwood (18), Scott Piercy (11)

-2: Shane Lowry (18), Ernie Els (7), Ethan Tracy (5) 

There are 12 players at -1 including Bubba Watson (18), Dustin Johnson (8) Jim Furyk (7) and Adam Scott (6)

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England's Justin Rose with a 60 foot attempt for a birdie on the 16th. He gets close but not this time, although it would have been a wonderful shot. Mickelson is also left ruing a missed opportunity at the same hole from about one-third the distance of Rose, just drifting left.

Meanwhile, on the 11th, American Scott Piercy, who is on three under, again misses a birdie attempt that would have taken him to a share of the lead. World number 624 Andrew Landry remains the surprise leader at four under. Now, how many of you would have predicted that at the start?