Oct 23, 2026
World Series Game 1 player props today: Friday's best props include Jacob Misiorowski [10/23/2026]
Read Article Mariners vs. Red Sox prediction: Boston favored to win Monday's MLB matchup [8/31/2026]
Updated: | First published:
Written by Jason Bevilacqua, Head of Content and Communities
Get Seattle Mariners vs Boston Red Sox predictions for MLB Monday.
The Boston Red Sox will take on the Seattle Mariners in MLB action at Fenway Park on Monday, starting at 6:45 PM ET.
Payton Tolle (8-6, 3.09 ERA) will get the ball for the Red Sox, while the Mariners have opted for George Kirby (9-10, 4.02 ERA).
Dimers' proven MLB model projects the Red Sox as the most likely winner in this Mariners vs. Red Sox prediction.
This article offers an expanded analysis of Monday's matchup, including best bets and picks.
Mariners vs. Red Sox prediction: Who will win and cover?
Using powerful machine learning and data, we have simulated the outcome of Monday's MLB game between the Mariners and Red Sox, forming part of our MLB predictions coverage.
Our independent predictive model currently gives the Red Sox a 57.0% chance of beating the Mariners.
According to our model, the Mariners (+1.5) have a 60.2% chance of covering the run line, while the 7.5-run over/under has a 57.4% chance of going over.
Mariners vs. Red Sox odds [8/31/2026]
We have researched the best MLB odds in America for this game, which are listed here:
- Run Line: Mariners +1.5 (-141) / Red Sox -1.5 (+138)
- Moneyline: Mariners +155, Red Sox -156
All odds are correct at the time of publication and are subject to change.
Mariners vs. Red Sox picks and best bet
After matching our probabilities against the best available odds, we can reveal our picks for each of the major markets in this matchup. Plus, find our best bet for the game below:
- Run line: Mariners +1.5 @ -141 via DraftKings
- Moneyline: Mariners @ +155 via DraftKings
- Total: Over 7.5 @ -108 via Polymarket
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.
Mariners vs. Red Sox game-day updates and essential details
Monday's MLB action between the Red Sox and Mariners at Fenway Park is scheduled to begin at 6:45 PM ET.
- Who: Seattle Mariners vs. Boston Red Sox
- Date: Monday, August 31, 2026
- Time: 6:45 PM ET/3:45PM PT
- Venue: Fenway Park
Conclusion
We predict the Red Sox, with a 57.0% win probability, will likely beat the Mariners in Monday'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.
Advertiser disclosure
