Pittsburgh Pirates vs. St. Louis Cardinals Prediction – August 28, 2026
The Pittsburgh Pirates make the trip to Busch Stadium to face the St. Louis Cardinals in what shapes up to be a compelling National League matchup on August 28, 2026. Despite playing on the road, the WP Baseball Predictor model firmly sides with Pittsburgh, assigning the Pirates a 61.4% win probability against the Cardinals' 38.6%. Here is a full breakdown of what is driving that lean.
Starting Pitcher Matchup: Jared Jones vs. Quinn Mathews
The pitching duel at the heart of this contest features two arms with closely matched advanced metrics, though a slight edge separates them on paper.
Jared Jones (Pirates)
Jared Jones takes the hill for Pittsburgh carrying an xFIP of 3.88. Expected Fielding Independent Pitching strips out the noise of defense and luck, and Jones's mark reflects a pitcher who has been genuinely solid at limiting hard contact and controlling his peripherals. For a Pirates rotation that carries a team FIP of 3.96, Jones aligns neatly with the staff's overall profile — suggesting he is a representative arm rather than an outlier.
Quinn Mathews (Cardinals)
Quinn Mathews counters with an xFIP of 3.74, the sharper number of the two starters on the day. On a pure pitching-matchup basis, Mathews holds a narrow advantage, and his performance fits within a Cardinals pitching staff carrying a team FIP of 4.16 — meaning Mathews has actually been outperforming his rotation as a whole. He will be the wild card to watch if St. Louis is to flip the model's projection.
Why the WP Model Favours Pittsburgh
Despite Mathews holding the slight xFIP edge, the WP Baseball Predictor's 61.4% win probability for Pittsburgh is driven by the broader team-level picture. Consider the following:
- Offensive efficiency: The Pirates carry a wOBA of .320, meaningfully ahead of the Cardinals' .306. wOBA is one of the most reliable measures of overall offensive production, and Pittsburgh's advantage here is significant enough to tip the scales even against a quality opposing starter.
- Pitching depth: Pittsburgh's team FIP of 3.96 compares favourably to St. Louis's 4.16, indicating that Pittsburgh's pitching staff has been more consistently reliable at preventing runs on a fundamental level.
- Team ERA: Both clubs carry nearly identical team ERAs — Pirates at 4.22, Cardinals at 4.24 — but the FIP gap suggests Pittsburgh's strong ERA is more sustainable going forward.
The combination of a superior offensive wOBA and a better underlying pitching FIP gives Pittsburgh a well-rounded edge that the model weights heavily enough to make the Pirates a strong favourite on the moneyline.
Injury Report: Key Absences to Monitor
Both rosters are dealing with notable absences that could influence lineup construction and bullpen usage.
Pirates Injuries
- Jhostynxon Garcia – Undisclosed (7-Day IL)
- Robert Hassell – Undisclosed (7-Day IL)
- Ryan O'Hearn – Quadriceps (10-Day IL)
- Endy Rodriguez – Hip (10-Day IL)
Cardinals Injuries
- Hunter Dobbins – Forearm (15-Day IL)
- Andre Pallante – Elbow (15-Day IL)
- Peter Strzelecki – Forearm (15-Day IL)
- Travis Honeyman – Undisclosed (7-Day IL)
- Everson Pereira – Hand (10-Day IL)
St. Louis is particularly hard-hit in the bullpen department, with Dobbins, Pallante, and Strzelecki all sidelined on 15-Day stints. A thin relief corps could become a serious liability if Mathews exits early, and that vulnerability only reinforces the Pittsburgh lean.
Dark Horse Home Run Picks
Looking for a long-ball prop to spice up your bet slip? These two names offer sneaky upside on August 28.
🔴 Pirates Pick: Rafael Flores Jr.
Keep an eye on Rafael Flores Jr. as a dark horse home run candidate for Pittsburgh. With O'Hearn sidelined and lineup spots potentially reshuffled, Flores Jr. could find himself in a prime position to exploit a Cardinals bullpen that is already stretched thin.
🔵 Cardinals Pick: Joshua Báez
On the St. Louis side, Joshua Báez is the name to watch for a surprise home run. With Pereira out and the Cardinals looking to generate offense against a capable Jones, Báez represents the kind of pop-capable wildcard who can alter a game with one swing.
Final Prediction
The WP Baseball Predictor model is clear: take the Pittsburgh Pirates moneyline on August 28, 2026. A superior wOBA, a stronger team FIP, and a Cardinals bullpen riddled with injuries create a compelling multi-layered case for Pittsburgh to steal a win on the road at Busch Stadium.