Kirby
RHP · Seattle Mariners · 2026 Season
Kirby has allowed a first-inning run in 12 of 30 starts in 2026 (40.0%). His 60.0% NRFI rate ranks #148 of 187 qualified starters (10+ starts). Last start: 2026-09-23.
2026 Starts
First Inning Performance
2026 season avg · 30 starts
About NRFI Stats
NRFI (No Runs First Inning) tracks whether a starting pitcher holds the opposing lineup scoreless in the first inning. A high NRFI rate indicates a pitcher who consistently gets through the first without giving up runs — a key signal for first-inning prop bets.
Through 30 starts this season, Kirby has held the first inning scoreless 18 times (60.0% NRFI rate). He's averaging 0.67 runs, 1.23 hits, 0.80 Ks, and 0.23 walks per first inning this season.
Opening Line Analytics combines Kirby's historical stats with real-time lineup data and 10,000-iteration Monte Carlo simulation to generate a combined NRFI probability before every start.
See Today's NRFI Prediction
Live first-inning predictions with Vegas odds, edge %, and Kelly bet sizing — updated daily before first pitch.
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