2025 U.S. Amateur: Mason Howell wins at The Olympic Club (Lake Course)
Mason Howell won the 2025 U.S. Amateur at The Olympic Club (Lake Course) in San Francisco, California, beating Jackson Herrington 7 & 6 in the final.
Updated October 21, 2026
Walk this draw in the U.S. Amateur room.
- Edition
- 125th
- Dates
- August 11, 2025 to August 17, 2025
- Course
- The Olympic Club (Lake Course), San Francisco, California
- Stroke-play co-host
- The Olympic Club (Ocean Course), San Francisco, Calif.
- Format
- stroke-play qualifying (36 holes) + match play
- Champion
- Mason Howell · age 18 · United States · Brookwood High School, Thomasville, Ga. (University of Georgia commit)
- Champion's title
- 1st U.S. Amateur
- Runner-up
- Jackson Herrington · age 19
- Final
- 7 & 6
- Losing semifinalists
- Niall Shiels Donegan and Eric Lee
- Stroke-play medalist
- Preston Stout (132)
- Defending champion
- José Luis Ballester · did not play (not in USGA stroke-play results)
- Entries
- 5,245
- What winning earned
- automatic place on 2025 USA Walker Cup Team (other exemptions not itemised for the champion in source)
What happened at the 2025 U.S. Amateur
Final: Howell drove the par-4 7th of the morning round to 15 feet and holed for eagle to go 4 up, then won 7 and 6 - at 18 the third-youngest champion, after surviving a 20-for-17 playoff as the No. 63 seed.
The final between Howell (18) and Jackson Herrington (19) was the youngest final in championship history.
, . The final between Howell (18) and Jackson Herrington (19) was the youngest final in championship history.
The draw
Every match is recorded through the round of 64.
The final, 2025 U.S. Amateur
| Winner | Beaten | Result | |
|---|---|---|---|
| Mason Howell | def. | Jackson Herrington | 7 & 6 |
Semifinals, 2025 U.S. Amateur
| Winner | Beaten | Result | |
|---|---|---|---|
| Jackson Herrington | def. | Niall Shiels Donegan | 1 up |
| Mason Howell | def. | Eric Lee | 3 & 2 |
Quarterfinals, 2025 U.S. Amateur
| Winner | Beaten | Result | |
|---|---|---|---|
| Niall Shiels Donegan | def. | Jacob Modleski | won on 19th hole |
| Jackson Herrington | def. | Jimmy Abdo | 4 & 2 |
| Mason Howell | def. | John Daly II | 1 up |
| Eric Lee | def. | Miles Russell | 1 up |
Round of 16, 2025 U.S. Amateur
| Winner | Beaten | Result | |
|---|---|---|---|
| Niall Shiels Donegan | def. | Preston Stout | 1 up |
| Jacob Modleski | def. | Paul Chang | 2 up |
| Jimmy Abdo | def. | Daniel Svard | 1 up |
| Jackson Herrington | def. | Caleb Bond | won on 20th hole |
| Mason Howell | def. | Max Herendeen | 2 & 1 |
| John Daly II | def. | Daniel Bennett | 3 & 2 |
| Miles Russell | def. | Mahanth Chirravuri | 2 & 1 |
| Eric Lee | def. | Josh Duangmanee | 2 up |
Round of 32, 2025 U.S. Amateur
| Winner | Beaten | Result | |
|---|---|---|---|
| Preston Stout | def. | David Liechty | 2 & 1 |
| Niall Shiels Donegan | def. | Christiaan Maas | 1 up |
| Paul Chang | def. | Tyler Weaver | 6 & 5 |
| Jacob Modleski | def. | Cameron Tankersley | 2 & 1 |
| Jimmy Abdo | def. | Wolfgang Glawe | 4 & 3 |
| Daniel Svard | def. | Andrew Bailey | 4 & 3 |
| Jackson Herrington | def. | Brady Siravo | 4 & 3 |
| Caleb Bond | def. | Davis Johnson | 5 & 3 |
| Mason Howell | def. | Ben James | 1 up |
| Max Herendeen | def. | Jackson Koivun | 3 & 2 |
| John Daly II | def. | Nate Smith | 2 & 1 |
| Daniel Bennett | def. | Rintaro Nakano | 5 & 3 |
| Miles Russell | def. | Billy Davis | 1 up |
| Mahanth Chirravuri | def. | Jase Summy | 3 & 2 |
| Josh Duangmanee | def. | Tim Wiedemeyer | won on 19th hole |
| Eric Lee | def. | Cohen Trolio | 6 & 5 |
Round of 64, 2025 U.S. Amateur
| Winner | Beaten | Result | |
|---|---|---|---|
| Preston Stout | def. | Pennson Badgett | 4 & 3 |
| David Liechty | def. | William Jennings | 2 & 1 |
| Niall Shiels Donegan | def. | Luke Poulter | 1 up |
| Christiaan Maas | def. | Ryan Downes | 3 & 1 |
| Paul Chang | def. | Garrett Risner | 2 up |
| Tyler Weaver | def. | Connor Graham | 2 & 1 |
| Jacob Modleski | def. | William Sides | 5 & 4 |
| Cameron Tankersley | def. | Nate Gahman | 3 & 2 |
| Jimmy Abdo | def. | Logan Reilly | 1 up |
| Wolfgang Glawe | def. | Tom Fischer | 1 up |
| Daniel Svard | def. | Payne Dedman | won on 20th hole |
| Andrew Bailey | def. | Andrew Tan | 1 up |
| Brady Siravo | def. | Bryan Kim | 2 & 1 |
| Jackson Herrington | def. | Chase Nevins | 1 up |
| Caleb Bond | def. | Charlie Forster | 2 & 1 |
| Davis Johnson | def. | Kolton Crawford | 2 & 1 |
| Mason Howell | def. | Tommy Morrison | won on 19th hole |
| Ben James | def. | Parker Claxton | 2 & 1 |
| Jackson Koivun | def. | Ryan Voois | 2 & 1 |
| Max Herendeen | def. | Árni Sveinsson | 4 & 3 |
| Nate Smith | def. | Bowen Mauss | 3 & 2 |
| John Daly II | def. | Cooper Claycomb | 1 up |
| Daniel Bennett | def. | Joshua Bai | 1 up |
| Rintaro Nakano | def. | Pongsapak Laopakdee | 1 up |
| Miles Russell | def. | Travis Woolf | 4 & 2 |
| Billy Davis | def. | Aston Lim | 4 & 3 |
| Jase Summy | def. | Zachary Miller | 5 & 3 |
| Mahanth Chirravuri | def. | Luke Colton | 1 up |
| Tim Wiedemeyer | def. | Reed Greyserman | 2 & 1 |
| Josh Duangmanee | def. | Clark Van Gaalen | 4 & 3 |
| Eric Lee | def. | Filip Jakubčík | won on 19th hole |
| Cohen Trolio | def. | Frankie Harris | 3 & 2 |
How this was built
Every value is shown as recorded in GNN's U.S. Amateur data set (research collected through October 20, 2026). "unknown" means no source confirmed it; nothing is estimated. Where sources disagree, the USGA's own record is used.
Values found only on Wikipedia, kept and flagged: champion_birthplace.
Data: us-amateur.json.