US Open golf 2023: second round – live updates

• Record breaking Rickie Fowler leads by one at halfway
• Rory McIlroy heads into the weekend just two shots back
• Official leaderboard | PGA confident over merger review

The first of the leaders is on the course. Wyndham Clark finds the middle of the fairway with his 318-yard drive at his first hole, the 10th. The winner of last month's Wells Fargo Championship is playing his seventh major and he's yet to end the week in the top 70. He looks set to end that trend after his superb 64 yesterday. His approach was very good too and has set up a 6-foot birdie putt.

History emphasises how important today's action will be. There have been 23 US Opens in the 21st century and 21 of the eventual champions were tied sixth or better after 36 holes. One of the exceptions was last year's winner Matt Fitzpatrick who was tied for 13th but only three shots back of the lead. There tends to be more significant movement on Friday in this championship than on the commonly accepted Moving Day (Saturday).