Aug 23, 2026
Nationals vs. Marlins prediction: Why Miami is favored to win Sunday's MLB matchup [8/23/2026]
Read Article Cubs vs. Mariners prediction: Cubs favored to win Sunday's MLB matchup [8/23/2026]
Updated: | First published:
Add Dimers on Google 
Written by Jason Bevilacqua, Head of Content and Communities
Get Chicago Cubs vs Seattle Mariners predictions for MLB Sunday.
The Seattle Mariners and Chicago Cubs will lock horns in MLB action at T-Mobile Park on Sunday, starting at 4:10 PM ET.
Bryce Miller (4-7, 3.71 ERA) will be the starting pitcher for the Mariners, pitting him against Shota Imanaga (8-9, 3.77 ERA) for the Cubs.
Dimers' advanced MLB model gives the Cubs a slight edge with a 50.9% win probability over the Mariners.
This article offers a complete Cubs vs. Mariners prediction, including best bets and picks.
Cubs vs. Mariners prediction: Who will win and cover?
Using trusted machine learning and data, we have simulated the outcome of Sunday's MLB matchup between the Cubs and Mariners, forming part of our MLB predictions coverage.
Our leading predictive model gives the Cubs a 50.9% chance of beating the Mariners.
According to our model, the Mariners (+1.5) have a 62.2% chance of covering the run line, while the 7.5-run over/under has a 53.2% chance of going over.
Cubs vs. Mariners odds [8/23/2026]
We have researched the best MLB odds in America for this game, which are listed here:
- Run Line: Cubs -1.5 (+156) / Mariners +1.5 (-160)
- Moneyline: Cubs -113, Mariners +111
All odds are correct at the time of publication and are subject to change.
Cubs 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 in this matchup. Plus, find our best bet for the game below:
- Run line: Mariners +1.5 @ -160 via DraftKings
- Moneyline: Mariners @ +111 via Novig
- Total: Over 7.5 @ +100 via Novig
According to our best MLB 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.
Cubs vs. Mariners game-day updates and essential details
Sunday's MLB action between the Mariners and Cubs at T-Mobile Park is scheduled to commence at 4:10 PM ET.
- Who: Chicago Cubs vs. Seattle Mariners
- Date: Sunday, August 23, 2026
- Time: 4:10 PM ET/1:10PM PT
- Venue: T-Mobile Park
Conclusion
We predict the Cubs, with a 50.9% win probability, will likely beat the Mariners in Sunday's MLB matchup.
Additional tools and information for betting safely can be found in our Responsible Gambling hub.
Continue reading with Dimers Pro
Join now to unlock this article and get full access to our predictions and betting tools. Cancel anytime.
EARLY BIRD PRICE
6 months of Dimers Pro
Full football season covered
NFL + College Football
One payment. Renews in 6 months.
Your Pro access is locked in for 6 months. Cancel or pause anytime.
Access to every sport, all season long.
Everything in Dimers Pro - not just football
Already a Pro member? Log in
New here? See everything Pro includes
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
