Chicago Cubs vs Washington Nationals Prediction – August 13, 2026
The Chicago Cubs travel to Washington to face the Nationals on August 13, 2026, in a compelling mid-season matchup that figures to be closer than the standings might suggest. WP Baseball Predictor has identified value on the home side, issuing a pick of Nationals +1.5 despite the Cubs holding the higher win probability in this contest.
Starting Pitcher Matchup: Gausman vs. Cavalli
The mound matchup is one of the most intriguing elements of this game, with two pitchers posting nearly identical xFIP figures heading into Thursday's contest.
Kevin Gausman (Cubs)
Gausman takes the ball for Chicago carrying an xFIP of 3.56, making him the marginally stronger pitcher on paper by this underlying metric. xFIP is a key indicator of a pitcher's true skill level, stripping out the influence of defense and luck on batted balls. Gausman's mark suggests he is pitching at a high level and profiles as a genuine ace-caliber arm capable of controlling the game's tempo against Washington's lineup.
Cade Cavalli (Nationals)
Cavalli counters with an xFIP of 3.64 — just eight points behind Gausman and well within the margin that separates two quality starters. The gap between these two pitchers is negligible, and Cavalli's underlying numbers suggest he is more than capable of keeping the Cubs offense in check throughout his outing. This near-identical xFIP pairing is a central reason this game does not carry a "strong favourite" designation from WP's model.
Why WP Baseball Predictor Favors the Nationals +1.5
While the Cubs hold a 57.9% win probability compared to the Nationals' 42.1%, WP's model identifies the run-line value on Washington's side. This is not a strong favourite designation, meaning Chicago's edge is real but modest. Several factors contribute to the lean toward Nationals +1.5:
- The near-identical xFIP figures (3.56 vs. 3.64) indicate this is a genuine pitcher's duel where either team could control the scoreboard.
- Both teams carry the same wOBA of 0.331, reflecting an evenly matched offensive output across the season.
- The Cubs' bullpen FIP of 4.74 leaves some vulnerability late in games, while Washington's home-field context adds marginal value to the run line.
- In a low-margin game like this, the +1.5 cushion for the Nationals provides meaningful insurance and represents the smarter side of the number.
Injury Report: Key Absences to Monitor
Both rosters are navigating notable injury situations that could influence the outcome, particularly in the bullpen.
Cubs Injuries
- Edward Cabrera (Hamstring, 15-Day IL) – A significant bullpen absence for Chicago.
- Phil Maton (Knee, 15-Day IL) – Further thins the Cubs' relief options.
- Gavin Hollowell (Shoulder, 15-Day IL), Corbin Martin (Undisclosed, 7-Day IL), and Juan Cabada (Lower Body, Out) round out a depleted relief corps.
Nationals Injuries
- James Wood (Oblique, 10-Day IL) – A meaningful offensive absence for Washington's lineup.
- Drew Millas (Finger, 10-Day IL), Connelly Early (Elbow, 15-Day IL), Jack Cebert and Eriq Swan (both Undisclosed, 7-Day IL) add further depth concerns.
Chicago's bullpen injuries are particularly worth watching — if Gausman exits early, the Cubs' relief options are noticeably thin heading into the later innings.
Dark Horse Home Run Picks
Every game carries its sleeper power threats, and WP Baseball Predictor has flagged one player per side worth monitoring on the long-ball market.
Cubs: Tyrone Taylor
Taylor is WP's dark horse HR pick for Chicago on Thursday. He represents a lower-profile bat in the lineup who carries the upside to go deep against right-handed pitching in a favorable environment.
Nationals: Abimelec Ortiz
Ortiz is the dark horse selection for Washington, a power-oriented profile who could exploit any early-count mistake from Gausman and provide a key moment in what projects to be a tightly contested ballgame.
Final Prediction: Nationals +1.5
With a near-identical pitching matchup, matching offensive profiles, and a depleted Chicago bullpen, the Nationals +1.5 represents the smart play on August 13. Back Washington to keep it within a run and cover the run line in what should be a quality pitcher's duel at Nationals Park.