Home / MLB / MLB Team Betting Records / Astros vs Mariners
Astros vs Mariners Betting History
The Astros and Mariners have met 176 times in the regular season since 2016, and the Astros lead the series 99-77. Betting the Astros on the closing moneyline in every meeting returned -8.26u; betting the Mariners returned -12.12u. The games went 79-90-7 against the total, leaning under.
Updated October 1, 2026. Closing lines, regular season meetings only, 2016 to 2026. How these numbers are calculated.
Astros vs Mariners betting summary
The moneyline favorite won 107 of 175 meetings with a clear favorite (61.1%). Betting the favorite every time returned -0.18u; betting the underdog every time returned -20.11u. The Astros were 85-90 on the run line in the series.
Astros vs Mariners results by season
Moneyline units risk 1 unit on that team in every meeting at the closing price.
| Season | Games | Astros record | Astros ML units | Mariners ML units | Astros run line | O/U/P | Avg total | Avg runs |
|---|---|---|---|---|---|---|---|---|
| 2026 | 13 | 3-10 | -6.99u | +4.61u | 5-8 | 8-4-1 | 8.04 | 10.31 |
| 2025 | 13 | 5-8 | -2.12u | +1.67u | 5-7 | 6-5-2 | 7.62 | 8.54 |
| 2024 | 13 | 5-8 | -3.23u | +2.81u | 5-8 | 3-9-1 | 7.42 | 6.31 |
| 2023 | 13 | 4-9 | -5.17u | +5.09u | 3-10 | 7-6-0 | 7.81 | 8.08 |
| 2022 | 19 | 12-7 | +0.69u | -3.05u | 10-9 | 8-11-0 | 7.87 | 7.26 |
| 2021 | 19 | 11-8 | -1.09u | +0.09u | 8-11 | 11-7-1 | 8.50 | 9.37 |
| 2020 | 10 | 7-3 | -0.11u | -1.66u | 5-5 | 4-6-0 | 9.00 | 8.40 |
| 2019 | 19 | 18-1 | +6.73u | -16.54u | 13-6 | 9-10-0 | 9.05 | 9.74 |
| 2018 | 19 | 9-10 | -4.33u | +5.20u | 8-11 | 9-10-0 | 7.92 | 8.11 |
| 2017 | 19 | 14-5 | +4.77u | -8.00u | 13-6 | 6-13-0 | 8.92 | 8.63 |
| 2016 | 19 | 11-8 | +2.58u | -2.34u | 10-9 | 8-9-2 | 8.13 | 8.32 |
| All | 176 | 99-77 | -8.26u | -12.12u | 85-90 | 79-90-7 | 8.23 | 8.48 |
Astros vs Mariners by ballpark
| Venue | Games | Astros record | Astros ML units | Astros run line | O/U/P | Avg total | Avg runs |
|---|---|---|---|---|---|---|---|
| At Astros home park | 93 | 53-40 | -8.19u | 40-52 | 43-47-3 | 8.47 | 8.65 |
| At Mariners home park | 83 | 46-37 | -0.07u | 45-38 | 36-43-4 | 7.97 | 8.30 |
Last 20 Astros vs Mariners games with closing odds
| Date | Game | Score | Winner | Close ML (away / home) | Total | O/U |
|---|---|---|---|---|---|---|
| Sep 23, 2026 | Astros at Mariners | 5-6 | Mariners | +108 / -130 | 7.5 | Over |
| Sep 22, 2026 | Astros at Mariners | 7-0 | Astros | +109 / -132 | 7 | Push |
| Aug 16, 2026 | Mariners at Astros | 3-2 | Mariners | +111 / -119 | 8 | Under |
| Aug 15, 2026 | Mariners at Astros | 10-5 | Mariners | +111 / -119 | 8.5 | Over |
| Aug 14, 2026 | Mariners at Astros | 7-10 | Astros | +111 / -119 | 8 | Over |
| May 14, 2026 | Mariners at Astros | 8-3 | Mariners | -119 / -102 | 9 | Over |
| May 13, 2026 | Mariners at Astros | 3-4 | Astros | -130 / +108 | 9 | Under |
| May 12, 2026 | Mariners at Astros | 10-2 | Mariners | -180 / +148 | 8.5 | Over |
| May 11, 2026 | Mariners at Astros | 3-1 | Mariners | -156 / +129 | 9 | Under |
| Apr 13, 2026 | Astros at Mariners | 2-6 | Mariners | +157 / -165 | 7.5 | Over |
| Apr 12, 2026 | Astros at Mariners | 1-6 | Mariners | +165 / -180 | 7.5 | Under |
| Apr 11, 2026 | Astros at Mariners | 7-8 | Mariners | +135 / -147 | 7.5 | Over |
| Apr 10, 2026 | Astros at Mariners | 6-9 | Mariners | +127 / -135 | 7.5 | Over |
| Sep 21, 2025 | Mariners at Astros | 7-3 | Mariners | -132 / +118 | 8 | Over |
| Sep 20, 2025 | Mariners at Astros | 6-4 | Mariners | -103 / -180 | 8 | Over |
| Sep 19, 2025 | Mariners at Astros | 4-0 | Mariners | -109 / -105 | 7.5 | Under |
| Jul 20, 2025 | Astros at Mariners | 11-3 | Astros | +115 / -116 | 6.5 | Over |
| Jul 19, 2025 | Astros at Mariners | 6-7 | Mariners | -115 / -110 | 7.5 | Over |
| Jul 18, 2025 | Astros at Mariners | 1-6 | Mariners | +120 / -154 | 7 | Push |
| May 25, 2025 | Mariners at Astros | 3-5 | Astros | -115 / +110 | 8.5 | Under |
Astros vs Mariners betting FAQ
Who leads the Astros vs Mariners series since 2016?
The Astros, 99-77 in 176 regular season meetings.
Is it profitable to bet the Astros against the Mariners?
At closing moneylines the Astros returned -8.26u (-4.7% ROI) over 176 games; the Mariners returned -12.12u.
Do Astros vs Mariners games go over or under?
79 overs, 90 unders and 7 pushes against the closing total. The average total was 8.23 and the games averaged 8.48 runs.
How do the favorites do in Astros vs Mariners games?
The moneyline favorite won 107 of 175 meetings with a clear favorite (61.1%). Betting the favorite every time returned -0.18u; betting the underdog every time returned -20.11u.
When did the Astros and Mariners last play?
Sep 23, 2026: the Mariners won 6-5.
Methodology
Every regular season meeting since 2016 comes from the Bet Legend game database with its final score, closing moneylines, closing 1.5 run line and closing total, and each game is checked against ESPN's official final score; postseason meetings are not included. Moneyline units risk 1 unit at the close: a win at -150 pays +0.67u, a win at +130 pays +1.30u. Over and under compare total runs with the closing total, and an exact match is a push. A "clear favorite" is a game where the two closing moneylines differ. These are market results, not BetLegend picks.