Rays vs. Mariners Prediction: Seattle Predicted to Win Saturday's MLB Matchup [8/9/2025]

The Seattle Mariners and Tampa Bay Rays will meet in MLB action at T-Mobile Park on Saturday, starting at 9:40PM ET.

The Mariners will send Logan Evans (5-4, 4.30 ERA) to the mound, up against Joe Boyle (1-1, 2.30 ERA) for the Rays.

Based on the latest simulations, Dimers' proven MLB model (see Dimers Pro for full access) projects the Mariners as the most likely winner of today's game.

For expanded analysis of Saturday's matchup, including best bets and picks, visit our interactive Rays vs. Mariners predictions page.

Mariners vs. Rays Prediction: Who Will Win, Cover the Run Line?

Using trusted machine learning and data, we have simulated the outcome of Saturday's MLB matchup between the Rays and Mariners 10,000 times as part of our MLB predictions coverage.

Our independent predictive model currently gives the Mariners a 56% chance of defeating the Rays.

According to our model, the Rays (+1.5) have a 63% chance of covering the run line, while the 7.5-run over/under has a 54% chance of going over.

Rays vs. Mariners Odds [8/9/2025]

We have sourced the best MLB odds in America for this game, which are listed here:

Bet Type	Rays	Mariners
Run Line	+1.5 (-176)	-1.5 (+150)
Moneyline	+123	-142
Total	o7.5 (-114)	u7.5 (+100)

All odds are correct at the time of publication and are subject to change.

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Rays vs. Mariners Picks and Best Bets

Our model's biggest edge in today's Rays vs. Mariners matchup is on the run line.

Our expert predictions, aligned with the current odds, reveal the best MLB picks and MLB best bets for every game throughout the season.

Unlimited access to our complete suite of picks, including this one, is available via Dimers Pro.

Calling Our Shot's Free MLB Picks

Calling Our Shot produces daily MLB betting content, including the predictions featured below.

Rays vs. Mariners Game-Day Updates and Essential Details

Saturday's MLB matchup between the Mariners and Rays at T-Mobile Park is scheduled to begin at 9:40PM ET.

• Who: Tampa Bay Rays vs. Seattle Mariners
• Date: Saturday, August 9, 2025
• Time: 9:40PM ET/6:40PM PT
• Venue: T-Mobile Park

Dimers.com's in-depth preview of Saturday's Rays vs. Mariners matchup includes our prediction, picks and the latest betting odds.

Before making any Rays vs. Mariners picks, be sure to check out the latest MLB predictions and betting advice from Dimers Pro.

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Conclusion

We predict the Mariners, with a 56% win probability, will likely beat the Rays on Saturday.

AI and automation have enhanced this article to quickly deliver accurate Rays vs. Mariners insights, with human oversight ensuring high editorial quality. Our predictions are sourced from the latest data to help you make informed decisions. For additional resources and advice on responsible gambling, please call 1-800-GAMBLER.

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