Can a PGA TOUR winner already be called a major champion? Not in William Mouw’s case. Entering the 2026 season, William Mouw Major Wins stands at zero across golf’s four men’s major championships. His biggest professional breakthrough to date is one PGA TOUR victory, the 2025 ISCO Championship.
William Mouw Major Wins: 2026 Scoreboard
William Mouw has not won the Masters Tournament, PGA Championship, U.S. Open or The Open Championship. A major victory remains an important next milestone for the former Pepperdine golfer, who established himself on the PGA TOUR with a win in Kentucky during 2025.
| Major Championship | William Mouw Major Wins | 2026 Scoreboard Status |
|---|---|---|
| Masters Tournament | 0 | No major title |
| PGA Championship | 0 | No major title |
| U.S. Open | 0 | No major title |
| The Open Championship | 0 | No major title |
| Total Major Championships | 0 | Entering 2026 |
William Mouw’s Biggest PGA TOUR Win
Although Mouw has no major championship titles, his 2025 ISCO Championship victory was a major career moment. He won the tournament at Hurstbourne Country Club in Louisville, Kentucky, finishing at 10-under par and beating Paul Peterson by one stroke.
The ISCO Championship is an official PGA TOUR event, but it is not one of golf’s four majors. It was played opposite the Genesis Scottish Open and carried a reduced FedExCup points allocation compared with full-field regular PGA TOUR events. Still, the win gave Mouw a significant boost in status, confidence and future playing opportunities.
| Career Achievement | Details |
|---|---|
| First PGA TOUR victory | 2025 ISCO Championship |
| Golf course | Hurstbourne Country Club, Louisville, Kentucky |
| Winning score | 10-under par |
| Margin of victory | 1 stroke over Paul Peterson |
| Major championship wins | 0 entering the 2026 season |
Why the ISCO Championship Does Not Count as a Major
Searches for “William Mouw major wins” can create confusion because a PGA TOUR victory is a prestigious achievement, but major championships are a separate category. Men’s professional golf recognizes only four major tournaments:
- The Masters Tournament at Augusta National Golf Club
- The PGA Championship
- The U.S. Open
- The Open Championship
Mouw’s win at Hurstbourne Country Club counts as an official PGA TOUR title, not a major championship win. His record is therefore one PGA TOUR victory and zero major wins entering 2026.
What a Major Win Would Mean for William Mouw
At a stage of his career when every PGA TOUR start can build momentum, Mouw’s 2025 victory provides an important foundation. Winning a major would place him among golf’s elite and deliver one of the sport’s most valuable long-term exemptions, including major-championship eligibility and a heightened position in the world rankings.
For now, William Mouw’s major championship résumé is still developing. His 2026 scoreboard begins with 0 major wins, while his 2025 ISCO Championship title remains the defining accomplishment of his professional career so far.
William Mouw Major Wins FAQ
How many major championships has William Mouw won?
William Mouw has won zero men’s major championships entering the 2026 season.
What PGA TOUR tournament did William Mouw win?
Mouw won the 2025 ISCO Championship at Hurstbourne Country Club in Louisville, Kentucky.
Is the ISCO Championship a golf major?
No. The ISCO Championship is an official PGA TOUR event, but it is not one of the Masters, PGA Championship, U.S. Open or The Open Championship.
