Ryder Cowan, a 21-year-old University of Oklahoma student, shot a two-under-par 68 in the opening round of the U.S. Open at Shinnecock Hills on June 18, tying the amateur record at the venue and sharing the early clubhouse lead. The round included four birdies and two bogeys, with play later suspended due to darkness. One source dates the event to 2026 while all performance details originate from CNA reporting.