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Read Article Diamondbacks vs. Mariners prediction: Seattle favored to win Sunday's MLB matchup [5/31/2026]
Updated: | First published:
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Written by Jason Bevilacqua, Head of Content and Communities
Get Arizona Diamondbacks vs Seattle Mariners predictions for MLB Sunday.
The Seattle Mariners will square off with the Arizona Diamondbacks in MLB action at T-Mobile Park on Sunday, commencing at 4:10 PM ET.
The Mariners will start Bryce Miller (1-0, 2.25 ERA), up against Merrill Kelly (5-3, 5.25 ERA) for the Diamondbacks.
Based on updated simulations, Dimers' advanced MLB model predicts the Mariners as the most likely winner of the Diamondbacks vs. Mariners game.
This article offers an expanded analysis of Sunday's matchup, including best bets and picks.
Diamondbacks vs. Mariners prediction: Who will win and cover?
Using powerful machine learning and data, we have simulated the outcome of Sunday's MLB game between the Diamondbacks and Mariners, forming part of our MLB predictions coverage.
Our famous predictive model currently gives the Mariners a 55% chance of defeating the Diamondbacks.
According to our model, the Diamondbacks (+1.5) have a 63% chance of covering the run line, while the over/under total of 7.5 runs has a 52% chance of going over.
Diamondbacks vs. Mariners odds [5/31/2026]
We have researched the best MLB odds in America for this game, which are listed here:
| Bet Type | Diamondbacks | Mariners |
|---|---|---|
| Run Line | +1.5 (-180) | -1.5 (+152) |
| Moneyline | +125 | -142 |
| Total | o7.5 (+100) | u7.5 (-120) |
All odds are correct at the time of publication and are subject to change.
Diamondbacks 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 | Diamondbacks +1.5 | -180 |
| Moneyline | Diamondbacks | +125 |
| Total | Over 7.5 | +100 |
According to our MLB best bets, the top play to make on this game is Over 7.5 total runs.
These picks are based on our probabilities matched against the implied probabilities from the sportsbook odds.
Diamondbacks vs. Mariners game-day updates and essential details
Sunday's MLB matchup between the Mariners and Diamondbacks at T-Mobile Park is scheduled to commence at 4:10 PM ET.
- Who: Arizona Diamondbacks vs. Seattle Mariners
- Date: Sunday, May 31, 2026
- Time: 4:10 PM ET/1:10PM PT
- Venue: T-Mobile Park
Conclusion
We predict the Mariners, with a 55% win probability, will likely beat the Diamondbacks 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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