Miami Marlins vs. New York Mets Prediction & Matchup Preview – July 31, 2026
The Miami Marlins head to New York to face the Mets on July 31, 2026, in a closely contested NL showdown. According to the WP Baseball Predictor model, this game is anything but a foregone conclusion — but Miami holds a slight edge heading into first pitch. Here's a full breakdown of the pitching matchup, injury concerns, and our dark horse home run picks for tonight's game.
Starting Pitcher Matchup: Junk vs. Peralta
The pitching matchup features two arms who profile as roughly league-average starters, making this a genuinely competitive duel on paper.
Janson Junk (Miami Marlins)
Janson Junk takes the mound for Miami carrying an xFIP of 4.14. The expected Fielding Independent Pitching metric strips out defense and luck to give us a cleaner picture of a pitcher's true performance level, and Junk's 4.14 mark places him in mid-rotation territory. He is not a swing-and-miss weapon, but he profiles as a pitcher who can generate enough contact management to keep Miami in games.
Freddy Peralta (New York Mets)
Peralta counters with an xFIP of 4.25, sitting slightly worse than Junk's mark by that measure. While the gap is narrow — just 0.11 points — it does contribute to the model's lean toward the Marlins. Peralta's 4.25 xFIP suggests he carries a touch more peripheral risk heading into this start, and in a close matchup, those margins matter.
When you compare the two starters head-to-head, Junk holds a modest but meaningful xFIP advantage, and that edge feeds directly into the WP model's assessment.
Why WP Baseball Predictor Favors the Marlins +1.5
The WP Baseball Predictor assigns Miami a Slight-Lean-tier win probability compared to New York, making the Marlins a slim but genuine favorite. The model does not flag this game as a strong favorite situation, meaning bettors should treat this as a lean rather than a lock.
Several factors align in Miami's favor beyond the pitching edge:
- Offensive output: The Marlins carry a team wOBA of 0.319, meaningfully higher than the Mets' 0.300. That 19-point gap in wOBA represents a real difference in overall offensive quality and run-creation ability.
- Pitching depth: Miami's team FIP sits at 4.09 with a team ERA of 4.08, while New York posts a team FIP of 4.06 and ERA of 4.11. These marks are nearly identical, confirming the pitching staffs are evenly matched at the team level.
- Run line value: The +1.5 run line for Miami provides a cushion that makes the Marlins an even more appealing play given the competitive nature of this matchup.
Injury Report: Key Absences to Watch
Both clubs are navigating notable injury lists heading into Friday's game.
Marlins Injuries
- Aiva Arquette – Thumb (7-Day IL)
- Anthony Bender – Lower Leg (15-Day IL)
- Nick Brink – Undisclosed (7-Day IL)
- Owen Caissie – Calf (10-Day IL)
- William Kempner – Elbow (15-Day IL)
Mets Injuries
- Jackson Cluff – Undisclosed (7-Day IL)
- Andy Ibanez – Undisclosed (7-Day IL)
- Ryan Lambert – Undisclosed (7-Day IL)
- Cole Mathis – Undisclosed (7-Day IL)
- Eddinson Paulino – Undisclosed (7-Day IL)
Both rosters are carrying five players on the IL, so neither team holds a significant roster-depth advantage. The Marlins' losses include bullpen arms in Bender and Kempner, which could impact late-game leverage situations if Miami's lead requires protecting.
Dark Horse Home Run Picks
Griffin Conine – Miami Marlins
Conine is our dark horse HR pick for Miami. In a game where run support could be at a premium, keep an eye on Conine to provide a big swing against Peralta.
Tyrone Taylor – New York Mets
Taylor earns the dark horse designation for New York. If the Mets are going to steal this game at home, Taylor launching one against Junk could be the decisive moment.
Final Prediction
WP Pick: Marlins +1.5 | Miami Win Probability: Slight Lean
This is a close, well-matched game between two competitive NL clubs. Miami's offensive edge — reflected in their superior team wOBA — combined with Junk's slightly better xFIP over Peralta gives the Marlins a narrow but legitimate model-backed advantage. Back Miami to cover the +1.5 run line on July 31.