- Starter matchup: Luis Castillo (Seattle Mariners) vs Walker Buehler (San Diego Padres).
- Lineup status: projected until official release.
- NRFI model: 45% probability, lean YRFI, -7.1% edge.
Pitching Matchup
On the season, Walker Buehler holds the ERA edge in this matchup. Luis Castillo carries a 6.92 ERA and 1.77 WHIP, while Walker Buehler sits at 4.97 ERA and 1.26 WHIP.
Strikeout rates: Luis Castillo at 9.69 K/9, Walker Buehler at 7.82 K/9.
K projections: Luis Castillo at 5.1 (line 4.5)
Walker Buehler projected at 4.2 (line 3.5).
Walker Buehler has a 65.3% career NRFI rate. No first-inning data available for Luis Castillo.
Both starters throw from the R side, limiting platoon splits for either lineup.
Strikeout Projections
Our strikeout model weighs pitcher K rate, opponent lineup whiff tendency, park factors, and umpire zone size to project total strikeouts per starter.
Luis Castillo (Seattle Mariners) is projected for 5.1 strikeouts against a posted line of 4.5. The projection is close to the line with no actionable edge.
He faces a moderate-K lineup that strikes out at 22.0% with a 28.0% whiff rate.
Walker Buehler (San Diego Padres) is projected for 4.2 strikeouts against a posted line of 3.5. The projection is close to the line with no actionable edge.
He faces a moderate-K lineup that strikes out at 22.0% with a 28.0% whiff rate.
The Seattle Mariners lineup is more vulnerable to strikeouts in this matchup. San Diego Padres batters K at 22.0%, Seattle Mariners batters at 22.0%.
NRFI & First 5 Analysis
Our NRFI model analyzes both starting pitchers' first-inning profiles, the top-of-order hitters in each lineup, the umpire's historical zone, and environmental factors to produce a probability estimate. For this game, the model assigns a 44.8% probability of no runs in the first inning, compared to the market's implied probability of 51.9%.
- That creates a slim -7.1% edge on YRFI.
- The best available line is NRFI -108 / YRFI -112 at FanDuel.
- Home plate umpire Brian Walsh runs a average zone. See the umpire section below for full career data.
- Our NRFI model sits at 13-17 (43.3%) on official picks this season.
Prop Edges
Lineup & Matchup Breakdown
Lineups are projected as of this writing.
Seattle Mariners K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.
San Diego Padres K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.
Ballpark, Weather & Umpire
- Petco Park carries a 0.96 run factor (neutral).
- Home run factor: 0.92 — the park suppresses HR power.
- Park notes: Cool San Diego weather; Low humidity suppresses HRs; Shallow right field.
- First pitch forecast: 66F with 8 mph winds from the WSW. Humidity: 63%.
- Temperature drops from 66F at first pitch to 62F by the late innings.
- Home plate umpire: Brian Walsh.
- Career NRFI rate: 51.9% across 79 games tracked.
- Zone tendency: Average.
- K factor: 1.031 (above average strikeouts in his games).
Run Projections & Total
- Our projection model puts the total at 5.3 combined runs, with Seattle Mariners projected for 2.8 and San Diego Padres for 2.6.
- That's 3.2 runs below the posted total of 8.5, suggesting a lean toward the Under.
- The run projection is essentially a coin flip between these two teams.