This market will resolve according to the player that finishes Round 1 of the main tournament at the 2026 US Open at Shinnecock Hills Golf Club with the lowest cumulative score. In the event of a tie, this market will resolve in favor of the player with the lower score on the back 9 of the first round. If a tie still persists, this market will resolve in favor of the player that records more eagles thus far in the main tournament. If a tie still persists, this market will resolve in favor of the player who records more birdies thus far in the main tournament. If a tie still persists, this market will resolve in favor of the player who records fewer bogeys thus far in the main tournament. If a tie still persists, this market will resolve in favor of the player whose listed last name comes first alphabetically. If the 2026 US Open at Shinnecock Hills Golf Club is cancelled, postponed after July 5, 2026, 11:59 PM ET, or if an official Round 1 leader has not been declared within that timeframe, this market will resolve to "Other". The primary resolution source will be the official results published by the US Open website (https://www.usopen.com/leaderboard).