Marlins vs. Astros prediction: Houston favored to win Tuesday's MLB matchup [7/21/2026]
Get Miami Marlins vs Houston Astros predictions for MLB Tuesday.
MLB action continues on Tuesday at 8:10 PM ET as the Miami Marlins square off with the Houston Astros at Daikin Park.
Tatsuya Imai (5-4, 6.06 ERA) will start for the Astros, while the Marlins are going with Tyler Phillips (2-4, 3.48 ERA).
Based on updated simulations, Dimers' advanced MLB model predicts the Astros as the most likely winner of the Marlins vs. Astros game.
This article offers further insights into Tuesday's matchup, including best bets and picks.
Marlins vs. Astros prediction: Who will win and cover?
Our famous predictive model currently gives the Astros a 56.8% chance of defeating the Marlins.
According to our model, the Marlins (+1.5) have a 59.2% chance of covering the run line, while the over/under total of nine runs has a 59.0% chance of going over,.
Marlins vs. Astros odds [7/21/2026]
We have researched the best MLB odds in America for this game, which are listed here:
| Bet Type | Marlins | Astros |
|---|---|---|
| Run Line | +1.5 (-178) | -1.5 (+174) |
| Moneyline | +113 | -115 |
| Total | o9 (+100) | u9 (+100) |
All odds are correct at the time of publication and are subject to change.
Marlins vs. Astros picks and best bet
After matching our predictions against the best current odds, we can reveal our picks for each of the major markets in this matchup. Plus, find our best bet for the game below:
| Bet Type | Pick | Bet Now |
|---|---|---|
| Run Line | Astros -1.5 | +174 |
| Moneyline | Astros | -115 |
| Total | Over 9 | +100 |
According to our MLB best bets, the top play to make on this game is Over 9 total runs.
These picks are based on our probabilities matched against the implied probabilities from the sportsbook odds.
Marlins vs. Astros game-day updates and essential details
Tuesday's MLB matchup between the Astros and Marlins at Daikin Park is scheduled to commence at 8:10 PM ET.
- Who: Miami Marlins vs. Houston Astros
- Date: Tuesday, July 21, 2026
- Time: 8:10 PM ET/5:10PM PT
- Venue: Daikin Park
Conclusion
We predict the Astros, with a 56.8% win probability, will likely beat the Marlins in Tuesday's MLB matchup.
Additional tools and information for betting safely can be found in 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.
