William Mouw rallied to win the ISCO Championship on Sunday for his first PGA Tour title, shooting a 9-under 61 and waiting nearly two hours to see if his 10-under 270 total would hold up.

William Mouw fired a nine-under par 61 to surge to a one-shot victory in the ISCO Championship in Kentucky on Sunday, capturing his first US PGA Tour title in his 20th start. Mouw started the final round seven shots off the pace,

William Mouw claimed his first PGA Tour title on Sunday at the 2025 ISCO Championship. The 24-year-old shot a bogey-free final round of 9-under 61 to finish with a total of 10-under 270, winning the event in his 20th start on the Tour. With this victory, Mouw earned a two-year PGA Tour exemption and a spot in next year’s PGA Championship.