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Read Article Cardinals vs. Marlins prediction: Why Miami is favored to win Tuesday's MLB matchup [4/21/2026]
Updated: | First published:
Written by Dave Garofolo, Content Producer
Get St. Louis Cardinals vs Miami Marlins predictions for MLB Tuesday.
MLB action continues on Tuesday at 6:40 PM ET as the St. Louis Cardinals lock horns with the Miami Marlins at loanDepot park.
The Marlins will start Chris Paddack (0-3, 5.59 ERA), up against Dustin May (2-2, 6.98 ERA) for the Cardinals.
Based on the latest simulation results, Dimers' proven MLB model gives the Marlins a slight edge with a 53% win probability over the Cardinals.
This article offers an expanded analysis of Tuesday's Cardinals vs. Marlins matchup, including best bets and picks.
Cardinals vs. Marlins prediction: Who will win?
Using powerful machine learning and statistical analysis, we have simulated the result of Tuesday's MLB game between the Cardinals and Marlins, forming part of our MLB predictions coverage.
Our independent predictive model gives the Marlins a 53% chance of beating the Cardinals.
According to our model, the over/under total of 8.5 runs also has an equal 50-50 chance of hitting.
Cardinals vs. Marlins odds [4/21/2026]
We have sourced the best MLB odds in America for this game, which are listed here:
| Bet Type | Cardinals | Marlins |
|---|---|---|
| Moneyline | +102 | -116 |
| Total | o8.5 (+100) | u8.5 (+100) |
All odds are correct at the time of publication and are subject to change.
Cardinals vs. Marlins picks and best bet
After matching our predictions against the best current 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 |
|---|---|---|
| Moneyline | Marlins | -116 |
| Total | Over 8.5 | +100 |
According to our MLB best bets, the top play to make on this game is Over 8.5 total runs.
These picks are based on our probabilities matched against the implied probabilities from the sportsbook odds.
Cardinals vs. Marlins game-day updates and essential details
Tuesday's MLB matchup between the Marlins and Cardinals at loanDepot park is scheduled to begin at 6:40 PM ET.
- Who: St. Louis Cardinals vs. Miami Marlins
- Date: Tuesday, April 21, 2026
- Time: 6:40 PM ET/3:40PM PT
- Venue: loanDepot park
Conclusion
We predict the Marlins, with a 53% win probability, will likely beat the Cardinals in Tuesday's MLB matchup.
Additional tools and information for betting safely can be found in our Responsible Gambling hub.
Dave Garofolo uses sophisticated AI-driven analytics to make predictions and evaluate player performances in the NBA, MLB, NFL, NHL, NCAAM, and PGA TOUR tournaments, crafting insightful game and prop previews.
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