With players and fans treated to fine weather at Oakmont Country Club on Friday, we look back on how Friday's eventful round unfolded via social media.
After so many near-misses, Dustin Johnson earned a share of the U.S. Open lead alongside fellow American Andrew Landry in his bid for a maiden major crown.
Landry had earlier set the opening-round total score record at Oakmont as he returned to complete just one hole after play was abandoned due to dangerous weather on Thursday.
Lee Westwood is outright third in Pennsylvania, just a stroke behind the leading duo, with the Englishman's second round due to tee off early on Saturday.
Bubba Watson did not hit a ball on Friday after carding a first-round 69 the day before, so the two-time major champion had time on his hands to babysit world number one Jason Day's son.
-- bubba watson (@bubbawatson) June 17, 2016
Defending champion Jordan Spieth (two over), Day (five over) and Rory McIlroy (seven over) have work to do at this year's second major.
Opening-round scores for the top three golfers in the world:-- Jason Sobel (@JasonSobelESPN) June 17, 2016
1. Jason Day: 76
2. Jordan Spieth: 72
3. Rory McIlroy: 77
Johnson was at his scintillating best as he played 36 consecutive holes, with his bogey-free first round the highlight. The 31-year-old carded a flawless 67 before going on to post a one-under-par 69.
Softened course means better scoring at the notoriously tricky Oakmont.
Johnson leading again prompted the PGA Tour to dig out a tweet from last year's Open, which saw the American gift Spieth the title after three-putting his final hole.
Dustin Johnson is leading a major championship.-- PGA TOUR (@PGATOUR) July 16, 2015
(Note: This tweet is recyclable ) pic.twitter.com/E87BpHGljA
It was a first round to forget for Day, who has seven holes remaining in his second round.
Jason Day's 76 in Round 1 was his first over-par opening round in his last 25 starts. pic.twitter.com/3wkaao9CU1-- PGA TOUR (@PGATOUR) June 17, 2016
Play was eventually suspended late on Friday due to darkness, with a big weekend ahead.
Playing until the sun goes down. pic.twitter.com/u4RPyj12sv-- PGA TOUR (@PGATOUR) June 18, 2016