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Read Article Cardinals vs. Diamondbacks prediction: Why Arizona is favored to win Saturday's MLB matchup [7/18/2026]
Updated: | First published:
Written by Dave Garofolo, Content Producer
Get St. Louis Cardinals vs Arizona Diamondbacks predictions for MLB Saturday.
The Arizona Diamondbacks and St. Louis Cardinals will lock horns in MLB action at Chase Field on Saturday, starting at 4:10 PM ET.
The Diamondbacks will start Brandon Pfaadt (3-1, 4.70 ERA), pitting him against Dustin May (5-6, 4.55 ERA) for the Cardinals.
Based on the latest simulations, Dimers' proven MLB model gives the Diamondbacks a slight edge with a 53.3% win probability over the Cardinals.
This article offers further insights into Saturday's Cardinals vs. Diamondbacks matchup, including best bets and picks.
Cardinals vs. Diamondbacks prediction: Who will win and cover?
Using innovative machine learning and data, we have simulated the outcome of Saturday's MLB matchup between the Cardinals and Diamondbacks, forming part of our MLB predictions coverage.
Our independent predictive model gives the Diamondbacks a 53.3% chance of beating the Cardinals.
According to our model, the Cardinals (+1.5) have a 62.7% chance of covering the run line, while the over/under total of 8.5 runs has a 60.1% chance of going over,.
Cardinals vs. Diamondbacks odds [7/18/2026]
We have sourced the best MLB odds in America for this game, which are listed here:
| Bet Type | Cardinals | Diamondbacks |
|---|---|---|
| Run Line | +1.5 (-200) | -1.5 (+165) |
| Moneyline | +108 | -108 |
| Total | o8.5 (-115) | u8.5 (+113) |
All odds are correct at the time of publication and are subject to change.
Cardinals vs. Diamondbacks picks and best bet
After matching our probabilities 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 | Diamondbacks -1.5 | +165 |
| Moneyline | Diamondbacks | -108 |
| Total | Over 8.5 | -115 |
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. Diamondbacks game-day updates and essential details
Saturday's MLB matchup between the Diamondbacks and Cardinals at Chase Field is scheduled to start at 4:10 PM ET.
- Who: St. Louis Cardinals vs. Arizona Diamondbacks
- Date: Saturday, July 18, 2026
- Time: 4:10 PM ET/1:10PM PT
- Venue: Chase Field
Conclusion
We predict the Diamondbacks, with a 53.3% win probability, will likely beat the Cardinals in Saturday'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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