Boston Red Sox vs Seattle Mariners · All-Time
44 meetings tracked · closing-line graded
RECORD
26-18
MEETINGS
44
ATS
17-9
O / U
17-9
Key Insights
- ▸Boston Red Sox lead 26-18 across 44 tracked meetings.
- ▸Games have averaged 10.4 combined points.
- ▸Boston Red Sox have been the better ATS side (17-9).
- ▸Strong Over trend: 17-9 O/U.
Year-by-Year Record
| Season | Games | Boston Red Sox | Seattle Mariners | ATS | O / U | Avg Total |
|---|---|---|---|---|---|---|
| 2025 | 6 | 3 | 3 | 3-3 | 3-3 | 7.5 |
| 2024 | 7 | 4 | 3 | 6-1 | 3-4 | 9.4 |
| 2023 | 6 | 3 | 3 | 3-3 | — | 11.0 |
| 2022 | 7 | 6 | 1 | 5-2 | 5-2 | 10.4 |
| 2021 | 4 | 2 | 2 | — | — | 9.8 |
| 2019 | 7 | 4 | 3 | — | — | 14.3 |
| 2018 | 7 | 4 | 3 | — | — | 9.6 |
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Frequently Asked Questions
What is the Boston Red Sox vs Seattle Mariners record all-time?▾
Across 44 all-time meetings, the Boston Red Sox lead the series 26-18.
What is the ATS trend in Boston Red Sox vs Seattle Mariners games?▾
ATS: Boston Red Sox are 17-9 vs the spread in these matchups. Seattle Mariners are 9-17.
Do Boston Red Sox vs Seattle Mariners games go over or under?▾
Over/under: games between Boston Red Sox and Seattle Mariners have gone over 17 times and under 9 times, with an average combined score of 10.4.
When did Boston Red Sox and Seattle Mariners last play?▾
See Last Meetings section for detailed score, spread, and total data from the most recent Boston Red Sox vs Seattle Mariners games.
Where can I see the 5-year Boston Red Sox vs Seattle Mariners history?▾
A 5-year head-to-head page tracks every Boston Red Sox 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 2018–2025. Older meetings aren't in this dataset yet.