Inside Edge
The Seattle Mariners are 18-33-0 Against the Spread in 2026
MLBAmerican • AL West
The Seattle Mariners are 18-33-0 ats record in 2026, a 35.29% rate with -20.93% ROI on flat $100 bets at closing odds. Closing lines from DraftKings, FanDuel, and BetMGM, graded against official MLB box scores.
Against the Spread
18-33-0
Win %
35.29%
ROI
-20.93%
Games
51
Mariners Monthly Performance
-21.2%18-33 · -10.8u
+3.8%
-20.6%
-29.2%
Mar
3-3
3-3
Apr
9-17
9-17
May
6-13
6-13
Home / Away ATS
Home
10-19-0
34.48%-20.18%
Away
8-14-0
36.36%-21.93%
Favorite / Underdog ATS
As Favorite
17-30-0
36.17%-17.52%
As Underdog
1-3-0
25%-61.03%
Recent Games (2026)
| Date | Opponent | Score | ATS |
|---|---|---|---|
| 2026-05-20 |  vs White Sox | W 5-4 | ✗ |
| 2026-05-19 | vs White Sox | L 1-2 | ✗ |
| 2026-05-18 | vs White Sox | W 6-1 | ✓ |
| 2026-05-17 |  vs Padres | L 3-8 | ✗ |
| 2026-05-16 | vs Padres | L 4-7 | ✗ |
| 2026-05-15 | vs Padres | L 0-2 | ✗ |
| 2026-05-14 |  @ Astros | W 3-8 | ✓ |
| 2026-05-13 | @ Astros | L 4-3 | ✗ |
| 2026-05-12 | @ Astros | W 2-10 | ✓ |
| 2026-05-11 | @ Astros | W 1-3 | ✓ |
Frequently Asked Questions
What is the Seattle Mariners ats record in 2026?
The Seattle Mariners are 18-33-0 (35.29%) ats record in 2026 on DraftKings, with -20.93% ROI.
What is the Seattle Mariners home vs away ats record?
Home: 10-19-0 (-20.18% ROI). Away: 8-14-0 (-21.93% ROI).
More Mariners Stats (2026)
Compare ATS Record
Against the Spread Record for the Seattle Mariners in the 2026 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.