Trendline Labs
MLBHead-to-HeadAll-Time

Baltimore Orioles vs Seattle Mariners · All-Time

Last updated: April 15, 2026

45 meetings tracked · closing-line graded

Across 45 all-time head-to-head meetings, Seattle Mariners lead 23-22. Games have averaged 8.1 combined points.

RECORD

22-23

MEETINGS

45

ATS

17-7

O / U

11-12

Key Insights

  • Seattle Mariners lead 23-22 across 45 tracked meetings.
  • Games have averaged 8.1 combined points.
  • Baltimore Orioles have been the better ATS side (17-7).

Year-by-Year Record

SeasonGamesBaltimore OriolesSeattle MarinersATSO / UAvg Total
20256515.7
20246424-23-27.3
20236424-23-38.2
20226243-35-19.8
20217347.1
201973411.1
20187167.4

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Frequently Asked Questions

What is the Baltimore Orioles vs Seattle Mariners record all-time?

Across 45 all-time meetings, the Seattle Mariners lead the series 23-22.

What is the ATS trend in Baltimore Orioles vs Seattle Mariners games?

ATS: Baltimore Orioles are 17-7 vs the spread in these matchups. Seattle Mariners are 7-17.

Do Baltimore Orioles vs Seattle Mariners games go over or under?

Over/under: games between Baltimore Orioles and Seattle Mariners have gone over 11 times and under 12 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 20182025. Older meetings aren't in this dataset yet.

Head-to-head data derived from closing-line game records. Stats update nightly from graded game results.

For informational and entertainment purposes only. Not betting advice. Please gamble responsibly.

Optimus

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