The 156-golfer field will be cut down to the top 60 and ties before the third round begins, which is different than the top 70 and ties used as the cut line by the PGA Championship and British Open and top 50 and ties at The Masters.

The 2015 PGA champion battled a wrist injury in the lead-up to the tournament, after a neck problem caused him grief as he missed the cut at the PGA Championship, but showed no signs of inhibition on Friday as he made four birdies and an eagle.

High School junior Mason Howell is the youngest golfer at the US Open. Follow along with updates on his Round 1 score and results.

Follow live text commentary from Oakmont as all the action unfolds from day 2 in the US Open.

The 2017 and 2018 US Open champion makes amends for his opening bogey on the 10th with a birdie on the par-four 11th. Koepka is back to where he started his second round – on two under. World No 1 Scottie Scheffler has got his second round under way at Oakmont,

Bryson DeChambeau is defending champion after last years win over Rory Mcllroy; world No 1 Scottie Scheffler is favourite to win the US Open at Oakmont Country Club; watch all four rounds live on Sky Sports Golf,

He gives a great interview and is always honest and interesting, and it's great to see him finding something like his best here - as his second birdie of the day in just three holes moves him under par for the tournament.

Ludvig Aberg has just offered us the perfect example of what makes Oakmont such a difficult course. The Swede finds the bunker with his third shot on the par-five 12th – he then misjudges his shot from the thick rough and runs his effort 10 feet past.