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Astros vs. Mariners prediction: Seattle favored to win Sunday's MLB matchup [4/12/2026]
Updated: | First published:
Written by Jason Bevilacqua, Head of Content and Communities
Get Houston Astros vs Seattle Mariners predictions for MLB Sunday.
The Seattle Mariners will face the Houston Astros in MLB action at T-Mobile Park on Sunday, commencing at 4:10 PM ET.
Logan Gilbert (0-2, 5.40 ERA) will be on the bump for the Mariners, up against Cody Bolton (0-0, 3.68 ERA) for the Astros.
Based on the latest simulation results, Dimers' advanced MLB model predicts the Mariners as the most likely winner of the Astros vs. Mariners game.
This article offers a closer look at Sunday's matchup, including best bets and picks.
Astros vs. Mariners prediction: Who will win and cover?
Using innovative machine learning and data analysis, we have simulated the result of Sunday's MLB matchup between the Astros and Mariners, forming part of our MLB predictions coverage.
Our famous predictive model gives the Mariners a 63% chance of defeating the Astros.
According to our model, the Astros (+1.5) have a 55% chance of covering the run line, while the over/under total of eight runs has an equal 50-50 chance of hitting.
Astros vs. Mariners odds [4/12/2026]
We have researched the best MLB odds in America for this game, which are listed here:
| Bet Type | Astros | Mariners |
|---|---|---|
| Run Line | +1.5 (-134) | -1.5 (+115) |
| Moneyline | +159 | -188 |
| Total | o8 (-103) | u8 (-117) |
All odds are correct at the time of publication and are subject to change.
Astros vs. Mariners picks and best bet
After matching our predictions against the best available odds, we can reveal our picks for each of the major markets. Plus, find our best bet for the game below:
| Bet Type | Pick | Bet Now |
|---|---|---|
| Run Line | Mariners -1.5 | +115 |
| Moneyline | Astros | +159 |
| Total | Over 8 | -103 |
According to our MLB best bets, the top play to make on this game is Over 8 total runs.
These picks are based on our probabilities matched against the implied probabilities from the sportsbook odds.
Astros vs. Mariners game-day updates and essential details
Sunday's MLB action between the Mariners and Astros at T-Mobile Park is scheduled to commence at 4:10 PM ET.
- Who: Houston Astros vs. Seattle Mariners
- Date: Sunday, April 12, 2026
- Time: 4:10 PM ET/1:10PM PT
- Venue: T-Mobile Park
Conclusion
We predict the Mariners, with a 63% win probability, will likely beat the Astros in Sunday's MLB matchup.
Additional tools and information for betting safely can be found in our Responsible Gambling hub.
Jason Bevilacqua, an expert in MLB, NHL, NBA, MLS, and NFL, delivers game previews, best bets, and props. Since 2020, as Head of Social and Community at Dimers, he has contributed insightful articles utilizing data-driven models and simulations.
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