Chicago White Sox @ Tampa Bay Rays Prediction – July 31, 2026
The Chicago White Sox make the trip to Tampa Bay to face the Rays on July 31, 2026, in a matchup where the WP Baseball Predictor model has a clear lean. Tampa Bay comes in as the projected winner, holding a 63.9% win probability compared to Chicago's 36.1%. While this doesn't qualify as a strong favourite situation by the model's standards, the edge is meaningful across several key categories. Here's a full breakdown of what to expect.
Starting Pitcher Matchup: Fedde vs. Martinez
The pitching matchup is arguably the most significant factor driving WP's lean toward Tampa Bay in this contest, and the advanced metrics tell a clear story.
Chicago will send Erick Fedde to the mound, who carries an xFIP of 4.91 into this start. xFIP — or Expected Fielding Independent Pitching — strips out defense and luck to measure a pitcher's true underlying performance. A mark approaching 5.00 indicates a pitcher who has been prone to giving up hard contact and free passes, and Fedde's number places him among the more hittable arms in the league at this point in the season.
Opposing him is Tampa Bay's Nick Martinez, who presents a significantly sharper profile with an xFIP of 3.83. That gap of more than a full point between the two starters is substantial and reflects a pitcher who has been generating weak contact and limiting baserunners with considerably more consistency than his counterpart. When two starters are separated by that kind of margin in expected performance, it naturally shifts the win probability needle — and it's a primary reason the model lands on the Rays side of this game.
Team Stats Support the Rays' Edge
Beyond the starting pitching matchup, the team-level numbers reinforce Tampa Bay's advantage. The Rays carry a team wOBA of 0.319, a FIP of 4.13, and a strong ERA of 3.69, suggesting both a capable offense and a pitching staff that has been limiting damage throughout the season. The White Sox are not far behind offensively with a wOBA of 0.315, but their pitching staff holds a FIP of 4.25 and an ERA of 4.08 — slightly softer numbers that edge Chicago further toward the unfavorable side of this matchup.
Injury Report: What to Watch
Both rosters have notable names on the injury list heading into this game, and roster depth could be a factor, particularly in a close, late-game scenario.
White Sox Injuries
- William Bergolla – Lower Leg (7-Day IL)
- Jose Colmenares – Undisclosed (7-Day IL)
- Rylan Galvan – Undisclosed (7-Day IL)
- Tyler Gilbert – Shoulder (15-Day IL)
- Jordan Sprinkle – Undisclosed (7-Day IL)
Rays Injuries
- Fabricio Blanco – Back (Out)
- Jake Fraley – Groin (10-Day IL)
- Wander Franco – Personal (Out)
- Taitn Gray – Elbow (7-Day IL)
- Justyn-Henry Malloy – Undisclosed (7-Day IL)
The White Sox are managing multiple undisclosed IL stints simultaneously, which can signal broader roster instability. Tampa Bay's absence of Wander Franco remains a longer-term storyline, but the team has demonstrated depth to compensate throughout the season.
Dark Horse Home Run Picks
Looking for some long-ball value on this slate? These two names are worth targeting at elevated odds.
White Sox: Munetaka Murakami
The powerful Japanese slugger has the raw power to go deep against any opponent, and facing a right-handed starter in a hitter-friendly environment could be the right spot for Murakami to make noise.
Rays: Victor Mesa Jr.
Mesa Jr. is an intriguing dark horse option for Tampa Bay. Keep an eye on him if he's in the lineup — he carries legitimate pop and could catch Chicago's bullpen off guard if this game extends into the later innings.
WP Baseball Predictor Final Pick
The WP Baseball Predictor model selects the Tampa Bay Rays moneyline as its play for July 31, 2026. With Nick Martinez's xFIP of 3.83 offering a substantial edge over Erick Fedde's 4.91, stronger team-level pitching metrics, and a 63.9% projected win probability, Tampa Bay is the clear analytical choice in this matchup. Bet responsibly.