St. Louis Cardinals vs Arizona Diamondbacks Picks and Prediction for Saturday, July 18, 2026
Use Code SSWC The St. Louis Cardinals visit the Arizona Diamondbacks at Chase Field (NH) in Hanover, New Hampshire, on Saturday, July 18, 2026, with the first pitch scheduled for 4:10 p.m. ET. MLB.TV will provide coverage. St. Louis enters at 50-45 overall and 24-19 on the road, while Arizona is 49-47 overall and 27-20 at home. The matchup predictor gives the Cardinals a 48.5% chance to win and the Diamondbacks a 51.5% probability. At the time of this writing the odds were not released. Be sure to check out our free MLB picks.
Starting Pitchers
The St. Louis starter is listed as undecided, while Brandon Pfaadt is scheduled to take the mound for Arizona. Pfaadt enters with a 3-1 record, 4.70 ERA, and 1.32 WHIP through 53.2 innings. He has allowed 53 hits and eight home runs while recording 41 strikeouts and issuing 18 walks. His winning record gives the Diamondbacks a defined starting option for Saturday’s matchup.
St. Louis Carries a Winning Road Record
St. Louis enters Saturday with a 50-45 overall record and an impressive 24-19 mark away from home. The Cardinals have won three of their last five games. They recently defeated Atlanta 4-1 and 2-1 while also earning a 5-1 victory over Milwaukee. St. Louis recently lost 4-3 to Atlanta and 8-4 to Milwaukee.
The Cardinals are batting .242 with 767 hits, 429 runs, and 107 home runs. Their offense has produced a .318 on-base percentage and a .390 slugging percentage. St. Louis owns a 4.13 team ERA and a 1.33 WHIP while allowing opponents to hit .251. The pitching staff has issued 318 walks and recorded 715 strikeouts. The Cardinals are 16-21 in day games.
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St. Louis holds its clearest advantage in the overall offensive comparison. The Cardinals lead Arizona in batting average, runs, hits, home runs, on-base percentage, and slugging percentage. Their team ERA is also slightly lower. St. Louis has won three of its last five and has a winning road record, but its 16-21 record in day games is a notable weakness entering this afternoon contest.
Arizona Returns With a Surging Offense
Arizona enters the matchup with a 49-47 overall record and a 27-20 home mark. The Diamondbacks have won four consecutive games and four of their last five overall. Arizona recently defeated the Los Angeles Dodgers 5-3, 9-2, and 9-3 after earning a 3-1 victory over San Diego. The Diamondbacks’ only loss during the supplied five-game stretch was a 10-4 result against San Diego.
The Diamondbacks are batting .237 with 755 hits, 416 runs, and 89 home runs. Arizona owns a .307 on-base percentage and a .384 slugging percentage. Its pitching staff has posted a 4.21 ERA and a 1.27 WHIP while holding opponents to a .249 batting average. The Diamondbacks have issued 273 walks and collected 655 strikeouts. Arizona has an even 18-18 record in day games.
Arizona’s strongest quality is its recent production on both sides. The Diamondbacks have outscored their opponents 26-9 during their four-game winning streak. They have scored at least five runs in three straight games and have allowed three runs or fewer in all four victories. Arizona also owns the lower team WHIP and opponent batting average. Its 27-20 home record adds to the case for the Diamondbacks in a closely matched contest.
St. Louis Cardinals vs Arizona Diamondbacks Picks and Prediction
St. Louis Cardinals vs Arizona Diamondbacks Pick
- Pick: Arizona Diamondbacks Moneyline
Arizona is my selection based on its four-game winning streak, 27-20 home record, and 51.5% matchup-predictor probability. St. Louis holds several season-long offensive advantages and has the slightly better overall record, so the statistical gap between these teams is narrow. However, Arizona has scored 26 runs while allowing only nine during its current winning streak. The Diamondbacks also hold the lower WHIP and opponent batting average. Their recent form and productive home record make Arizona the preferred side.
St. Louis Cardinals vs Arizona Diamondbacks Total Pick
- Pick: Over 8.5
Take the over if the total is set at 8.5. I favor the over because three of Arizona’s last five games produced at least 11 combined runs, including totals of 11, 12, and 14. The Diamondbacks have scored 27 runs across their last three contests, while St. Louis has produced at least four runs in four of its last five. Arizona’s scheduled starter carries a 4.70 ERA, and the two pitching staffs have team ERAs of 4.13 and 4.21. Based on Arizona’s recent scoring surge, I prefer the over at 8.5.
Final Score Prediction: Arizona Diamondbacks 6 – St. Louis Cardinals 4
This prediction was written before the completion of game play on Friday.
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