Cardinals vs. Blue Jays Prediction – July 31, 2026
The St. Louis Cardinals head north of the border to face the Toronto Blue Jays on July 31, 2026, in a matchup that sets up as one of the more intriguing pitching contrasts of the late-season calendar. While the Blue Jays enter as the clear favorite on the moneyline, the WP Baseball Predictor model identifies value on the Cardinals at +1.5, making the run line the smart play according to the algorithm's current projection.
Starting Pitcher Matchup: Leahy vs. Cease
The pitching matchup is where this game truly takes shape — and where the sharpest gap between these two clubs becomes evident.
Kyle Leahy (Cardinals)
Kyle Leahy takes the ball for St. Louis carrying an xFIP of 4.07. That number suggests a pitcher who is roughly in line with league-average performance, carrying some real risk against a Blue Jays lineup that will look to exploit any inconsistency early in the contest. Leahy will need to execute efficiently and work deep into counts carefully if the Cardinals are to keep themselves within striking distance.
Dylan Cease (Blue Jays)
On the other side, Dylan Cease is the clear headliner of this pitching duel. Cease carries an elite xFIP of 2.38, placing him among the very best starters in the league by that measure. His ability to generate weak contact and limit damage at the expected level is a significant advantage for Toronto, and represents the single biggest factor in the Blue Jays' 55.5% win probability heading into first pitch. When a starter posts an xFIP that low, opposing offenses face a steep hill to climb.
Why WP's Model Backs Cardinals +1.5
Despite Cease's dominance on the mound, the WP Baseball Predictor stops short of labeling the Blue Jays a "strong favorite," with Toronto's win probability sitting at 55.5% and St. Louis holding a still-meaningful 44.5% chance of winning outright. That relatively narrow gap is where the run line value emerges.
The team-level statistics tell a story of two clubs that are closer than the pitching matchup might imply. Consider the following:
- Cardinals wOBA: 0.303 | Blue Jays wOBA: 0.298
- Cardinals FIP: 4.17 | Blue Jays FIP: 4.05
- Cardinals ERA: 4.16 | Blue Jays ERA: 4.15
At the roster and bullpen level, these teams are virtually identical in run prevention and offensive output. The Cardinals actually hold a slight edge in wOBA, meaning their lineup as a whole has generated marginally better quality contact this season. Even against Cease, St. Louis has enough offensive capability to stay within a run or two — which is precisely the scenario the +1.5 run line is designed to capitalize on.
Injury Report: Key Absences to Watch
Injuries on both sides could influence the game's outcome, particularly in the bullpen and lineup depth.
Cardinals Injuries
- Skylar Hales – Undisclosed (7-Day IL)
- Travis Honeyman – Undisclosed (7-Day IL)
- JoJo Romero – Abdomen (15-Day IL)
- Ethan Young – Undisclosed (7-Day IL)
Blue Jays Injuries
- Brandon Barriera – Undisclosed (7-Day IL)
- Jonatan Clase – Foot (10-Day IL)
- Patrick Corbin – Shoulder (15-Day IL)
- Daniel Guerra – Elbow (7-Day IL)
- Nolan Perry – Concussion (7-Day IL)
Toronto's bullpen depth takes a notable hit with both Barriera and Guerra unavailable, which could matter if Cease exits early. The Cardinals are also without multiple relievers, making late-game management a factor for both benches.
Dark Horse Home Run Picks
Every matchup carries sleeper power threats worth monitoring, and July 31 is no different.
Cardinals: Nelson Velázquez
Velázquez has the raw power to go deep against elite arms when he gets a pitch to drive. Facing a high-strikeout pitcher like Cease, one mistake could be all he needs.
Blue Jays: Luis Urías
Urías is a disciplined hitter who can work counts and punish pitchers who leave balls over the plate. Against Leahy's 4.07 xFIP, there is legitimate opportunity for Urías to find the seats.
Final Prediction
The WP Baseball Predictor's lean is Cardinals +1.5. Dylan Cease gives Toronto a clear edge in this matchup, but the near-identical team metrics and a competitive Cardinals lineup make the run line a defensible value play. Expect a close, low-to-mid-scoring affair where St. Louis has every reason to stay within reach.