Arizona Diamondbacks vs. Washington Nationals Prediction – July 25, 2026
The Washington Nationals host the Arizona Diamondbacks on July 25, 2026, in a National League interleague matchup that our WP Baseball Predictor model views with a clear lean. With a projected win probability of 62.9% in favor of Washington, the model issues a Nationals moneyline pick for this contest. Here is a full breakdown of the factors driving that projection.
Starting Pitcher Matchup: Griffin Holds a Commanding Edge
The single most decisive factor in this game may be what is happening on the mound. The pitching matchup sets up strongly in Washington's favor, and the advanced metrics tell the story plainly.
Foster Griffin (Washington Nationals)
Foster Griffin takes the ball for the Nationals carrying an xFIP of 3.79, a number that places him firmly among the more reliable starters in the league on any given night. xFIP — expected Fielding Independent Pitching — strips out defense and sequencing luck to measure a pitcher's true run-prevention quality. A mark below 4.00 signals genuine effectiveness, and Griffin's 3.79 indicates he is capable of keeping opposing lineups in check throughout a start.
Mitch Bratt (Arizona Diamondbacks)
Arizona counters with Mitch Bratt, who carries a xFIP of 6.26 into this assignment. That number represents a significant concern for Arizona's chances tonight. An xFIP above 6.00 suggests a pitcher who is liable to surrender hard contact and put runners on base at a damaging rate. The gap between Griffin's 3.79 and Bratt's 6.26 is not marginal — it is the kind of disparity that anchors an entire win probability model toward one side.
Team Offensive and Pitching Context
Looking beyond the starters, the team-level stats add further texture to this matchup. The Nationals carry a wOBA of .331, meaningfully outpacing Arizona's wOBA of .308. Washington's offense is generating more overall offensive value on a per-plate-appearance basis, which matters significantly when they are squaring off against a starter with Bratt's elevated xFIP.
On the pitching staff side, Arizona's collective numbers are stronger — a team FIP of 4.51 and ERA of 4.20 compared to Washington's FIP of 4.77 and ERA of 4.77 — but that advantage is largely neutralized tonight given the specific starter matchup in play.
Injury Report: Key Absences on Both Sides
Both rosters are dealing with notable absences heading into Saturday's game, though Arizona's injury list carries more significant weight.
- Diamondbacks: Zac Gallen (Elbow, 15-Day IL) and Lourdes Gurriel Jr. (Thigh, 10-Day IL) represent meaningful losses. Gallen's absence from the rotation is part of why Bratt draws this start. Yordin Chalas, Patrick Forbes, and Aramis Garcia are also unavailable.
- Nationals: Washington is without Landon Harmon, Seaver King, Brad Lord, Drew Millas, and PJ Poulin — several of whom are sidelined with oblique, forearm, and finger injuries. These absences thin the roster but do not directly undercut the team's core offensive or starting pitching strengths for this game.
The depth of Arizona's injury list, particularly the rotation-level impact of losing Gallen and the positional losses in the lineup, adds further downward pressure on the Diamondbacks' 37.1% win probability.
Dark Horse Home Run Picks
Every game carries longshot power potential. Here are our dark horse HR picks for July 25:
- Diamondbacks Dark Horse: Tyler Locklear — Locklear is worth monitoring as a sneaky power threat if he gets a favorable count against Griffin.
- Nationals Dark Horse: Luis García Jr. — With Washington's offense humming and facing a starter with a 6.26 xFIP, García Jr. is well-positioned to do damage and makes for an intriguing long-shot HR play.
WP Baseball Predictor Final Pick
The combination of a massive starting pitcher xFIP gap, a superior Washington offense by wOBA, and the weight of Arizona's injury concerns makes the model's lean straightforward. WP Baseball Predictor picks the Washington Nationals moneyline at a 62.9% win probability. This is not flagged as a strong favourite play, so proper unit sizing is advised, but the analytical case for Washington is clear and well-supported by the data.