American J.J. Spaun atop the 125th US Open leaderboard at Oakmont on Friday as defending champion Bryson DeChambeau failed to make the 36-hole cut.

Sunshine Tour star Thriston Lawrence will start the final day at the US Open five shots behind leader Sam Burns.

U.S. Open is tight heading into the final round. If there's a tie after 72 holes, here's what to know about the playoff rules and history.