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Guardians vs. Mariners prediction: Seattle favored to win MLB Opening Day matchup [3/26/2026]
Updated: | First published:
Written by Jason Bevilacqua, Head of Content and Communities
Get Cleveland Guardians vs Seattle Mariners predictions for MLB Thursday.
The Seattle Mariners and Cleveland Guardians will lock horns on opening day of the 2026 MLB season at T-Mobile Park on Thursday, starting at 10:10 PM ET.
The Mariners will send Logan Gilbert (0-0, 0.00 ERA) to the mound, while the Guardians have opted for Tanner Bibee (0-0, 0.00 ERA).
Based on the latest simulations, Dimers' upgraded MLB model projects the Mariners as the most likely winner of the Guardians vs. Mariners game.
This article offers a closer look at Thursday's matchup, including best bets and picks.
Guardians vs. Mariners prediction: Who will win on MLB Opening Day?
Using trusted machine learning and data, we have simulated the result of Thursday's MLB game between the Guardians and Mariners, forming part of our MLB predictions coverage.
Our leading predictive model currently gives the Mariners a 62% chance of defeating the Guardians.
According to our model, the Guardians (+1.5) have a 57% chance of covering the run line, while the over/under total of 6.5 runs has a 55% chance of going over.
Guardians vs. Mariners odds [3/26/2026]
We have sourced the best MLB odds in America for this game, which are listed here:
| Bet Type | Guardians | Mariners |
|---|---|---|
| Run Line | +1.5 (-144) | -1.5 (+130) |
| Moneyline | +158 | -185 |
| Total | o6.5 (-115) | u6.5 (+100) |
All odds are correct at the time of publication and are subject to change.
Guardians 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 | +130 |
| Moneyline | Guardians | +158 |
| Total | Over 6.5 | -115 |
According to our MLB best bets, the top play to make on this game is Over 6.5 total runs.
These picks are based on our probabilities matched against the implied probabilities from the sportsbook odds.
Guardians vs. Mariners game-day updates and essential details
Thursday's MLB action between the Mariners and Guardians at T-Mobile Park is scheduled to start at 10:10 PM ET.
- Who: Cleveland Guardians vs. Seattle Mariners
- Date: Thursday, March 26, 2026
- Time: 10:10 PM ET/7:10PM PT
- Venue: T-Mobile Park
Conclusion
We predict the Mariners, with a 62% win probability, will likely beat the Guardians on Thursday.
AI and automation have enhanced this article to quickly deliver accurate Guardians vs. Mariners insights, with human oversight ensuring high editorial quality. Our predictions are based on up-to-date data to help you make informed decisions. For additional resources and advice, head to our responsible gambling hub.
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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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