Seattle Mariners vs Washington Nationals · All-Time
16 meetings tracked · closing-line graded
RECORD
7-9
MEETINGS
16
ATS
6-9
O / U
10-5
Key Insights
- ▸Washington Nationals lead 9-7 across 16 tracked meetings.
- ▸Games have averaged 8.8 combined points.
- ▸Washington Nationals have been the better ATS side (9-6).
- ▸Strong Over trend: 10-5 O/U.
Year-by-Year Record
| Season | Games | Seattle Mariners | Washington Nationals | ATS | O / U | Avg Total |
|---|---|---|---|---|---|---|
| 2026 | 3 | 1 | 2 | 1-2 | — | 11.3 |
| 2025 | 3 | 1 | 2 | 1-2 | — | 10.3 |
| 2024 | 3 | 1 | 2 | 1-2 | 1-2 | 8.3 |
| 2023 | 3 | 1 | 2 | 1-2 | 2-1 | 9.3 |
| 2022 | 4 | 3 | 1 | 2-1 | 1-2 | 5.8 |
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Frequently Asked Questions
What is the Seattle Mariners vs Washington Nationals record all-time?▾
Across 16 all-time meetings, the Washington Nationals lead the series 9-7.
What is the ATS trend in Seattle Mariners vs Washington Nationals games?▾
ATS: Seattle Mariners are 6-9 vs the spread in these matchups. Washington Nationals are 9-6.
Do Seattle Mariners vs Washington Nationals games go over or under?▾
Over/under: games between Seattle Mariners and Washington Nationals have gone over 10 times and under 5 times, with an average combined score of 8.8.
When did Seattle Mariners and Washington Nationals last play?▾
See Last Meetings section for detailed score, spread, and total data from the most recent Seattle Mariners vs Washington Nationals games.
Where can I see the 5-year Seattle Mariners vs Washington Nationals history?▾
A 5-year head-to-head page tracks every Seattle Mariners vs Washington Nationals meeting from the last five full seasons. Link at the bottom of this page.
Data coverage: Trendline's head-to-head records include closing-line-graded games from 2022–2026. Older meetings aren't in this dataset yet.