J.J. Spaun leads the 2025 U.S. Open after a bogey-free 66 at Oakmont Country Club, with only 10 golfers finishing under par on day one. Jon Rahm and Brooks Koepka are close behind, starting Round 2 three and two strokes back respectively. Rahm's consistent game and Koepka's return to major contention add excitement to the tournament. The challenging course has proven difficult, setting the stage for a competitive second round.

Prepared by Emily Rhodes and reviewed by editorial team.