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Early Preview Lineups: Confirmed Odds Posted 6 min read

San Francisco Giants vs Washington Nationals Preview

San Francisco Giants vs Washington Nationals preview with model projections: Adrian Houser projected 4.5 K (line 3.5), NRFI probability 54%, 12 mph wind. Ful...

San Francisco Giants at Washington Nationals MLB game preview for April 18, 2026
SF
San Francisco Giants
Adrian Houser RHP
@
4:05 PM ET
Nationals Park
WSH
Washington Nationals
Cade Cavalli RHP
Last updated Saturday, April 18, 2026
Final This game has finished. Read the recap for final score, model grades, and box score.

Key Facts

Matchup
San Francisco Giants at Washington Nationals
Date
Saturday, April 18, 2026
First Pitch
4:05 PM ET
Venue
Nationals Park
Probable Starters
Adrian Houser (RHP) vs Cade Cavalli (RHP)
Lineups
Confirmed
Odds Snapshot
Apr 18, 4:06 PM ET
Last Updated
Apr 18, 6:08 PM ET

Betting Board

Snapshot Apr 18, 4:06 PM ET
Moneyline
SF +110
WSH +105
Total
Over 13.5 +110
Under 13.5 -146
Run Line
SF +1.5 -450
WSH -1.5 +300

Model Angles

NRFI Model
NRFI · 54%
+4.7% edge
Projected Total
4.9
model combined runs
Park Factor
0.99
Neutral · HR 0.96
First Pitch Weather
78°F
12 mph E
The San Francisco Giants visit the Washington Nationals at 4:05 PM ET at Nationals Park. Probable starters: Adrian Houser for San Francisco Giants opposite Cade Cavalli for Washington Nationals. Lineups are confirmed. This preview is built deterministically from projected lineups, probable starters, NRFI model context, market prices, first-pitch weather, park factors, and TheCapperIO model context.
  • Starter matchup: Adrian Houser (San Francisco Giants) vs Cade Cavalli (Washington Nationals).
  • Lineup status: confirmed by both teams.
  • NRFI model: 54% probability, lean NRFI, +4.7% edge.

Pitching Matchup

SF Away
Adrian Houser
RHP · 0-2 · 4 GS
ERA
5.40
WHIP
1.57
K/9
4.57
IP
21.2
Career: 4.10 ERA · 1.37 WHIP · 6.99 K/9
NRFI: 72.3%
1st Inn ERA: 3.92
WSH Home
Cade Cavalli
RHP · 0-1 · 5 GS
ERA
4.12
WHIP
1.73
K/9
8.24
IP
19.2
Career: 4.83 ERA · 1.57 WHIP · 7.93 K/9

On the season, Cade Cavalli holds the ERA edge in this matchup. Adrian Houser carries a 5.40 ERA and 1.57 WHIP, while Cade Cavalli sits at 4.12 ERA and 1.73 WHIP.
Strikeout rates: Adrian Houser at 4.57 K/9, Cade Cavalli at 8.24 K/9.
K projections: Adrian Houser at 4.5 (line 3.5)
Cade Cavalli projected at 4.5 (line 3.5).
Adrian Houser has a 72.3% career NRFI rate. No first-inning data available for Cade Cavalli.
Both starters throw from the R side, limiting platoon splits for either lineup.

Strikeout Projections

Adrian Houser vs WSH
Proj: 4.5Line: 3.5
+1.0
Confidence:
Cade Cavalli vs SF
Proj: 4.5Line: 3.5
+1.0
Confidence:
View all K projections on SlateIQ

Our strikeout model weighs pitcher K rate, opponent lineup whiff tendency, park factors, and umpire zone size to project total strikeouts per starter.

Adrian Houser (San Francisco Giants) is projected for 4.5 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.

Cade Cavalli (Washington Nationals) is projected for 4.5 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 San Francisco Giants lineup is more vulnerable to strikeouts in this matchup. Washington Nationals batters K at 22.0%, San Francisco Giants batters at 22.0%.

NRFI & First 5 Analysis

NRFI Model
53.7%
probability of NRFI
+4.7%
market edge
Monitor
Market implied: 49.0%Model: 53.7%
First 5 Innings
2.7est. F5 runs
SF
5.40 ERA
5.3 inn/start
WSH
4.12 ERA
3.8 inn/start
F5 lean: Moderate WSH
SF K Projection
Adrian Houser
4.5proj
Line: 3.5
+1.0 NEUTRAL
Confidence
WSH K Projection
Cade Cavalli
4.5proj
Line: 3.5
+1.0 NEUTRAL
Confidence
Explore all model projections

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 53.7% probability of no runs in the first inning, compared to the market's implied probability of 49.0%.

  • That creates a slim 4.7% edge on NRFI.
  • The best available line is NRFI +104 / YRFI -138 at FanDuel.
  • Home plate umpire Brennan Miller runs a average zone. See the umpire section below for full career data.
  • Our NRFI model sits at 15-17 (46.9%) on official picks this season.

Prop Edges

3 model signals detected
Hits (1+) Strong Hit 0.5
68.5%
Hits (1+) Lean Hit 0.5
66.2%
Hits (1+) Lean Hit 0.5
65.5%
See all today's picks and edges

Lineup & Matchup Breakdown

San Francisco Giants Confirmed
K%: 22.0
2Luis ArraezL2B
4Rafael DeversL1B
Whiff rate: 28.0%Team page
Washington Nationals Confirmed
K%: 22.0
6Daylen LileLLF
Whiff rate: 28.0%Team page
Batter vs Pitcher matchup tool

Lineups are confirmed as of this writing.

San Francisco Giants K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.

Washington Nationals K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.

Ballpark, Weather & Umpire

Nationals Park
Run Factor0.99
HR Factor0.96
Full park profile
Home Plate Umpire
Brennan Miller
Slightly wide NRFI: 55.1% 89 games
Full umpire profile
Hourly Game Forecast
78°
4 PM
12 mph
E
80°
5 PM
11 mph
ESE
79°
6 PM
12 mph
ESE
75°
7 PM
12 mph
SE
  • Nationals Park carries a 0.99 run factor (neutral).
  • Home run factor: 0.96 — the park neutral for HR power.
  • Park notes: Potomac River proximity; Humid DC climate; Relatively neutral dimensions.
  • First pitch forecast: 78F with 12 mph winds from the E. Humidity: 58%.
  • Temperature drops from 78F at first pitch to 75F by the late innings.
  • Wind advisory: 12 mph winds from the E may impact fly balls.
  • Home plate umpire: Brennan Miller.
  • Career NRFI rate: 55.1% across 89 games tracked.
  • Zone tendency: Slightly wide.
  • K factor: 0.992 (league average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 4.9 combined runs, with San Francisco Giants projected for 2.4 and Washington Nationals for 2.5.
  • That's 8.6 runs below the posted total of 13.5, suggesting a lean toward the Under.
  • The run projection is essentially a coin flip between these two teams.
The Bottom Line
This is a data-first preview, not a pick. Treat the NRFI model signal as context alongside the pitching matchup. Verify current odds before placing any bet. Bet responsibly. 1-800-GAMBLER.
This preview is generated from thecapper.io projection models and publicly available data. All projections are model estimates, not guarantees. Gamble responsibly. If you or someone you know has a gambling problem, call 1-800-GAMBLER.