Mark O'Neill
Defender · Seattle Sounders · №40
Recent matches
| Date | Match | Score |
|---|---|---|
Seattle Sounders
Guadalajara Chivas
Leagues Cup
|
1:2 | |
Seattle Sounders
Querétaro
Leagues Cup
|
3:0 | |
Toluca
Seattle Sounders
Leagues Cup
|
3:0 |
Season statistics
| Competition | Season | Games |
|---|---|---|
| Leagues Cup | 2026 | 3 |
About the player
Mark O'Neill's path into Major League Soccer ran through college football rather than a club academy. Between 2020 and 2024 he combined studies at Creighton University with appearances for Vermont Green FC in USL League Two, including a run in the 2024 US Open Cup.
The breakthrough came at Vancouver Whitecaps FC 2 in 2025, where O'Neill made 27 appearances and scored nine goals. He signed a first-team contract with the Whitecaps that September and was part of the Vancouver squad that won the Canadian Championship the same year.
His time in Vancouver's first-team squad was short. In February 2026 O'Neill joined Tacoma Defiance, Seattle Sounders' MLS NEXT Pro affiliate, as a free agent. He made 20 appearances there in the 2026 season, scoring once and setting up three goals, before a shortage of available players led Seattle to sign him to the first team on a Short-Term Agreement that August. He featured in the Leagues Cup, coming on as a substitute against Querétaro on 9 August.
O'Neill has not been capped by the United States national team. In Seattle, the surname is not new: his older brother, Shane O'Neill, previously played for the Sounders.
Career path
- 2026 — now Tacoma Defiance 20 matches
- 2026 Seattle Sounders 2 matches
- 2025 Whitecaps FC 2 27 matches
- 2024 Vermont Green 1 match
Career
| Season | Club | Competition | Games | Goals | Assists | Minutes |
|---|---|---|---|---|---|---|
| 2026 | Tacoma Defiance | MLS Next Pro | 20 | 1 | 4 | 1 655 |
| 2026 | Seattle Sounders | Leagues Cup | 2 | 0 | 0 | 97 |
| 2025 | Whitecaps FC 2 | MLS Next Pro | 26 | 7 | 3 | 2 328 |
| 2025 | Whitecaps FC 2 | MLS Next Pro Playoffs | 1 | 2 | 0 | 90 |
| 2024 | Vermont Green | US Open Cup | 1 | 0 | 0 | 22 |
| Total | Whitecaps FC 2 | 27 | 9 | 3 | 2 418 | |
| Total | Tacoma Defiance | 20 | 1 | 4 | 1 655 | |
| Total | Seattle Sounders | 2 | 0 | 0 | 97 | |
| Total | Vermont Green | 1 | 0 | 0 | 22 |
Transfers
Transfers- 25/26 Vancouver FC Tacoma Defiance
- 25/26 Whitecaps 2 Vancouver FC
- 24/25 CU Bluejays Whitecaps 2
- 24/25 Vermont Green CU Bluejays
- 23/24 CU Bluejays Vermont Green
- 23/24 Vermont Green CU Bluejays
- 22/23 CU Bluejays Vermont Green
- 22/23 Vermont Green CU Bluejays
- 21/22 CU Bluejays Vermont Green
- 20/21 Real Colorado CU Bluejays
