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Baltimore Orioles Lead Seattle Mariners 18-11 in Head-to-Head Matchups

MLB8-16-0 ATS (33.33%)Data through 2025-08-14

Mariners vs Orioles Betting Record

Against the Spread

8-16-0

Win %

33.33%

ROI

-29.73%

Units

-7.1

Moneyline

11-18-0

Win %

37.93%

ROI

-28.75%

Units

-8.3

Over Rate

11-11-2

Win %

50%

ROI

-3.88%

Units

-0.8

From the Other Side — Orioles vs Mariners

Against the Spread

16-8-0

Win %

66.67%

ROI

+23.57%

Units

+5.7

Moneyline

18-11-0

Win %

62.07%

ROI

+26.65%

Units

+7.7

Over Rate

11-11-2

Win %

50%

ROI

-3.88%

Units

-0.8

Venue Splits

Mariners Home

5-7-0 ATS

41.67% • -12%

5-10-0 ML (33.33%)

Orioles Home

9-3-0 ATS

75% • +39%

8-6-0 ML (57.14%)

Scoring Averages

Mariners

3.8

PPG

3.9

allowed

Total

7.7

Avg

29

games

Orioles

3.9

PPG

3.8

allowed

Recent Matchups

Date	Matchup	Score	Spread	ATS	ML	O/U
08/142025-08-14	Mariners @ Orioles	L 5-3	-1.5	✗	L	U
08/132025-08-13	Mariners @ Orioles	L 4-3	-1.5	✗	L	U
08/122025-08-12	Mariners @ Orioles	W 0-1	-1.5	✗	W	U
06/052025-06-05	Orioles @ Mariners	L 3-4	-1.5	✗	L	U
06/042025-06-04	Orioles @ Mariners	L 2-3	-1.5	✓	L	U
06/032025-06-03	Orioles @ Mariners	L 1-5	-1.5	✗	L	U
07/042024-07-04	Orioles @ Mariners	W 7-3	-1.5	✓	W	O
07/032024-07-03	Orioles @ Mariners	L 1-4	-1.5	✗	L	U
07/022024-07-02	Orioles @ Mariners	L 0-2	-1.5	✗	L	U
05/192024-05-19	Mariners @ Orioles	L 6-3	-1.5	✗	L	O
05/182024-05-18	Mariners @ Orioles	W 3-4	-1.5	✓	W	P
05/172024-05-17	Mariners @ Orioles	L 9-2	-1.5	✗	L	O
08/132023-08-13	Orioles @ Mariners	L 3-5	-1.5	✗	L	P
08/122023-08-12	Orioles @ Mariners	L 0-1	-1.5	✗	L	U
08/112023-08-11	Orioles @ Mariners	W 9-2	-1.5	✓	W	O
06/252023-06-25	Mariners @ Orioles	L 3-2	-1.5	✗	L	U
06/242023-06-24	Mariners @ Orioles	L 6-4	-1.5	✗	L	O
06/232023-06-23	Mariners @ Orioles	W 1-13	-1.5	✓	W	O
06/292022-06-29	Orioles @ Mariners	W 9-3	-1.5	✓	W	O
06/282022-06-28	Orioles @ Mariners	W 2-0	-1.5	✓	W	U

Frequently Asked Questions

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

The Seattle Mariners are 11-18 against the Baltimore Orioles in head-to-head matchups.

What is the Seattle Mariners ATS record vs the Baltimore Orioles?

The Seattle Mariners are 8-16-0 against the spread vs the Baltimore Orioles on DraftKings, with -29.73% ROI.

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

Seattle Mariners vs Baltimore Orioles games average 7.7 total points. The Over has hit 50% of the time.

More Mariners Matchups

See from Orioles perspective

Head-to-head betting record for Seattle Mariners vs Baltimore Orioles on LineTerminal. The Mariners are 11-18 straight up against the Orioles and 8-16-0 against the spread (33.33% cover rate, -29.73% ROI) on DraftKings. Data sourced from DraftKings closing lines. Updated daily after games are graded. Past performance does not guarantee future results.