Baltimore Orioles vs Seattle Mariners · All-Time
52 meetings tracked · closing-line graded
RECORD
25-27
MEETINGS
52
ATS
21-10
O / U
14-15
Key Insights
- ▸Seattle Mariners lead 27-25 across 52 tracked meetings.
- ▸Games have averaged 8.1 combined points.
- ▸Baltimore Orioles have been the better ATS side (21-10).
Year-by-Year Record
| Season | Games | Baltimore Orioles | Seattle Mariners | ATS | O / U | Avg Total |
|---|---|---|---|---|---|---|
| 2026 | 7 | 3 | 4 | 4-3 | 3-3 | 8.0 |
| 2025 | 6 | 5 | 1 | — | — | 5.7 |
| 2024 | 6 | 4 | 2 | 4-2 | 3-2 | 7.3 |
| 2023 | 6 | 4 | 2 | 4-2 | 3-3 | 8.2 |
| 2022 | 6 | 2 | 4 | 3-3 | 5-1 | 9.8 |
| 2021 | 7 | 3 | 4 | — | — | 7.1 |
| 2019 | 7 | 3 | 4 | — | — | 11.1 |
| 2018 | 7 | 1 | 6 | — | — | 7.4 |
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Frequently Asked Questions
What is the Baltimore Orioles vs Seattle Mariners record all-time?▾
Across 52 all-time meetings, the Seattle Mariners lead the series 27-25.
What is the ATS trend in Baltimore Orioles vs Seattle Mariners games?▾
ATS: Baltimore Orioles are 21-10 vs the spread in these matchups. Seattle Mariners are 10-21.
Do Baltimore Orioles vs Seattle Mariners games go over or under?▾
Over/under: games between Baltimore Orioles and Seattle Mariners have gone over 14 times and under 15 times, with an average combined score of 8.1.
When did Baltimore Orioles and Seattle Mariners last play?▾
See Last Meetings section for detailed score, spread, and total data from the most recent Baltimore Orioles vs Seattle Mariners games.
Where can I see the 5-year Baltimore Orioles vs Seattle Mariners history?▾
A 5-year head-to-head page tracks every Baltimore Orioles vs Seattle Mariners 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 2018–2026. Older meetings aren't in this dataset yet.