Inside Edge
The Seattle Mariners are 31-18-0 ATS as Underdogs in 2025
MLBAmerican • AL WestData through 2025-10-20
Underdog ATS
31-18-0
Win %
63.27%
ROI
+0.67%
Games
49
Underdog ML
25-24-0
Win %
51.02%
ROI
+11.6%
Games
49
Mariners Monthly Performance
-11.2%78-96 · -19.5u
-55.2%
+20.4%
-21.4%
-34.6%
-12.4%
-25.4%
+14.9%
-2.8%
Mar
1-4
1-4
Apr
15-10
15-10
May
11-16
11-16
Jun
9-18
9-18
Jul
11-15
11-15
Aug
10-17
10-17
Sep
14-11
14-11
Oct
7-5
7-5
Home / Away as Underdog ATS
Home
16-5-0
76.19%+18.49%
Away
15-13-0
53.57%-12.69%
Recent Games (2025)
| Date | Opponent | Score | ATS | ML | O/U |
|---|---|---|---|---|---|
| 2025-10-20 |  @ Blue Jays | L 4-3 | ✓ | L | U |
| 2025-10-19 | @ Blue Jays | L 6-2 | ✗ | L | O |
| 2025-10-17 | vs Blue Jays | W 6-2 | ✓ | W | O |
| 2025-10-16 | vs Blue Jays | L 2-8 | ✗ | L | O |
| 2025-10-15 | vs Blue Jays | L 4-13 | ✗ | L | O |
| 2025-10-13 | @ Blue Jays | W 3-10 | ✓ | W | O |
| 2025-10-12 | @ Blue Jays | W 1-3 | ✓ | W | U |
| 2025-10-10 |  vs Tigers | W 3-2 | ✓ | W | U |
| 2025-10-08 | @ Tigers | L 9-3 | ✗ | L | O |
| 2025-10-07 | @ Tigers | W 4-8 | ✓ | W | O |
Frequently Asked Questions
What is the Seattle Mariners as underdog in 2025?
The Seattle Mariners are 31-18-0 (63.27%) as underdog in 2025 on DraftKings, with +0.67% ROI.
What is the Seattle Mariners home vs away as underdog?
Home: 16-5-0 (+18.49% ROI). Away: 15-13-0 (-12.69% ROI).
More Mariners Stats (2025)
Compare As Underdog
Record as Underdog for the Seattle Mariners in the 2025 season on LineTerminal. Data sourced from DraftKings closing lines. Updated daily after games are graded. Past performance does not guarantee future results. LineTerminal offers advanced system-building tools to research Seattle Mariners betting trends across 80+ filters and 5+ years of data.