Cameron Smith and Phil Mickelson on the 12th hole during the first round of the U.S Open at Oakmont. The pair would shoot +5 and +4 respectively. 

1.   Amateur Matt Vogt of the United States hits a tee shot on the second hole during the first round of the 125th U.S Open at Oakmont. Beautiful photo by Patrick Smith of Getty Images.

1.    Maxwell Moldovan of the United States reacts with his caddie after holing-out for eagle on the first hole at Oakmont. It would be his only score under par in his score of six-over 76.

Bryson DeChambeau plays his second shot on the first hole of the 125th U.S OPEN at Oakmont on his way to a respectable three-over 73. 

JJ Spaun shot four-under 66 to be a surprise leader of the 125th U.S OPEN at Oakmont, and modelled for a cracking shot by Warren Little of Getty Images.

Rory McIlroy was as perplexed as anyone with his first round of four-over 74 at the 125th U.S Open at Oakmont. He is tied for 63rd.

Xander Schauffele reacts after a missed putt on the second hole at Oakmont. He would scrap to a respectable two-over 72.

Adam Scott had five birdies in his outward nine 33 but two bogies coming home saw him post even-par 70.

Amateur Trevor Gutschewski of the United States plays a shot from the famous church pew bunker on the fourth hole at Oakmont. He would shoot 80 and finish T142.

The jury remains out for Thirston Lawrence after his second shot on the par-5 12th hole at Oakmont. He would make birdie on his way to three-under 67 and outright second after day one of the U.S Open at Oakmont.

Jason Day from a greenside bunker on the second hole at Oakmont. He would make a bogey-5 on his way to a disappointing six-over 76.

Patrick Reed after making albatross on the fourth hole during the first round of the 125th U.S. Open at Oakmont. He would finish three-over and tied for 50th. 

Scottie Scheffler is a tad perplexed on his way to a first round score of three-over 73 at Oakmont.

Brooks Koepka (left) shot a fine two-under 68 in the first round at Oakmont while playing partner Min Woo Lee had seven bogies in his seven-over 77.