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MLB MatchupsFri 8:15 PM ET
Washington
Nationals
C. Cavalli RHP
VS
St. Louis
Cardinals
K. Leahy RHP
MLB · WSH at STL

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Simonsays

21-7 record · 75.0% wins
Last 30 days · MLB

$500 pick on the moneyline

Washington Nationals vs St. Louis Cardinals Predictions: Cade Cavalli vs Kyle Leahy

Game time: September 18, 2026 at 8:15 PM ET

Article updated Sep 18, 12:42 AM EDT

By SportsJaw Editorial Team

Washington’s scheduled starter brings strong recent numbers to this 2026 MLB matchup. St. Louis’ better season bullpen statistics complicate the betting case.

The starters offer only part of the answer

The Washington Nationals visit the St. Louis Cardinals on September 18, 2026, with Cade Cavalli and Kyle Leahy listed as the scheduled starters. Covers identifies the exact matchup and both pitchers.

Cavalli has recorded 194 strikeouts in 31 starts this season. Across his last three starts, he allowed seven hits, four earned runs and five walks in 16 innings while striking out 25. His September 11 outing against the Angels included six innings, two earned runs and nine strikeouts. Those results support a favorable assessment of his recent pitching, but do not establish Washington’s overall advantage.

Leahy’s last five starts carry a 3.06 ERA. His individually dated outings show different outcomes: he allowed five earned runs in 2 2/3 innings at Colorado on September 6, then delivered three scoreless innings against the White Sox on September 12. Those short appearances make the relief comparison relevant.

Bullpen counterevidence and the betting prices

St. Louis has the lower season bullpen ERA and WHIP: 3.79 and 1.26, compared with Washington’s 4.17 and 1.34. Washington’s relievers also allowed seven runs, six earned, and seven walks over 9 1/3 innings across their last three games. That creates a meaningful reservation about backing the Nationals solely on Cavalli’s form.

SportsJaw lists Washington’s moneyline at -105 and St. Louis’ moneyline at -115. The available offensive and lineup information does not establish that either price offers value.

The total is 7.5, with over 7.5 (-115) and under 7.5 (-105). The pitching evidence points in competing directions, and the available information does not establish a sufficiently supported scoring expectation. Neither a total wager nor a precise projected score is justified.

Final selection

Pass. Cavalli’s recent performance is encouraging, but the bullpen comparison and incomplete offensive picture leave the full-game outcome too uncertain for a recommendation.

Confidencelow
Betting lean

Pass

Sources

  • CoversNationals vs Cardinals Game Overview, Stats, Injuries, Records - MLB Game on September 18, 2026

SportsJaw Nationals vs Cardinals game preview analysis and predictions incorporate current odds, injury reports, team statistics and market data. Information is updated regularly, but lines and player availability can change. Please confirm current information before wagering. View history of past Nationals vs Cardinals matchups or learn how our predictions work.