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Early Preview Lineups: Projected Odds Posted 6 min read

New York Yankees vs Boston Red Sox Preview

New York Yankees vs Boston Red Sox preview with model projections: Luis Gil projected 4.2 K (line 4.5), NRFI probability 57%, 11 mph wind. Full breakdown ins...

New York Yankees at Boston Red Sox MLB game preview for April 21, 2026
NYY
New York Yankees
Luis Gil RHP
@
6:45 PM ET
Fenway Park
BOS
Boston Red Sox
Connelly Early LHP
Last updated Tuesday, April 21, 2026
Final This game has finished. Read the recap for final score, model grades, and box score.

Key Facts

Matchup
New York Yankees at Boston Red Sox
Date
Tuesday, April 21, 2026
First Pitch
6:45 PM ET
Venue
Fenway Park
Probable Starters
Luis Gil (RHP) vs Connelly Early (LHP)
Lineups
Projected
Odds Snapshot
Apr 21, 6:46 PM ET
Last Updated
Apr 21, 6:09 PM ET

Betting Board

Snapshot Apr 21, 6:46 PM ET
Moneyline
NYY +113
BOS -120
Total
Over 8.5 -110
Under 8.5 -110
Run Line
NYY +1.5 -205
BOS -1.5 +168

Model Angles

NRFI Model
NRFI · 57%
+4.5% edge
Projected Total
4.4
model combined runs
Park Factor
1.08
Hitter friendly · HR 1.15
First Pitch Weather
45°F
10.8 mph ESE
The New York Yankees visit the Boston Red Sox at 6:45 PM ET at Fenway Park. Probable starters: Luis Gil for New York Yankees opposite Connelly Early for Boston Red Sox. Lineups are projected until first pitch. 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: Luis Gil (New York Yankees) vs Connelly Early (Boston Red Sox).
  • Lineup status: projected until official release.
  • NRFI model: 57% probability, lean NRFI, +4.5% edge.

Pitching Matchup

NYY Away
Luis Gil
RHP · 0-1 · 2 GS
ERA
7.00
WHIP
1.44
K/9
7.00
IP
9.0
Career: 3.62 ERA · 1.27 WHIP · 9.39 K/9
NRFI: 81.6%
1st Inn ERA: 1.96
BOS Home
Connelly Early
LHP · 1-0 · 4 GS
ERA
2.29
WHIP
1.27
K/9
9.15
IP
19.2
Career: 2.31 ERA · 1.18 WHIP · 11.31 K/9

On the season, Connelly Early holds the ERA edge in this matchup. Luis Gil carries a 7.00 ERA and 1.44 WHIP, while Connelly Early sits at 2.29 ERA and 1.27 WHIP.
Strikeout rates: Luis Gil at 7.00 K/9, Connelly Early at 9.15 K/9.
K projections: Luis Gil at 4.2 (line 4.5)
Connelly Early projected at 5.1 (line 5.5).
Luis Gil has a 81.6% career NRFI rate. No first-inning data available for Connelly Early.
This is a RHP vs LHP matchup, creating potential platoon advantages in both lineups.

Strikeout Projections

Luis Gil vs BOS
Proj: 4.2Line: 4.5
-0.3
Confidence:
Connelly Early vs NYY
Proj: 5.1Line: 5.5
-0.4
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.

Luis Gil (New York Yankees) is projected for 4.2 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.

Connelly Early (Boston Red Sox) is projected for 5.1 strikeouts against a posted line of 5.5. 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 New York Yankees lineup is more vulnerable to strikeouts in this matchup. Boston Red Sox batters K at 22.0%, New York Yankees batters at 22.0%.

NRFI & First 5 Analysis

NRFI Model
56.8%
probability of NRFI
+4.5%
market edge
Monitor
Market implied: 52.4%Model: 56.8%
First 5 Innings
2.4est. F5 runs
NYY
7.00 ERA
4.5 inn/start
BOS
2.29 ERA
4.8 inn/start
F5 lean: Strong BOS
NYY K Projection
Luis Gil
4.2proj
Line: 4.5
-0.3 NEUTRAL
Confidence
BOS K Projection
Connelly Early
5.1proj
Line: 5.5
-0.4 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 56.8% probability of no runs in the first inning, compared to the market's implied probability of 52.4%.

  • That creates a slim 4.5% edge on NRFI.
  • The best available line is NRFI -110 / YRFI -110 at FanDuel.
  • Home plate umpire Austin Jones runs a average zone. See the umpire section below for full career data.
  • Our NRFI model sits at 17-23 (42.5%) on official picks this season.

Prop Edges

3 model signals detected
Hits (1+) Lean Hit 0.5
66.7%
Home Run Very Strong 0.5
14.9%
Home Run Very Strong 0.5
13.4%
See all today's picks and edges

Lineup & Matchup Breakdown

New York Yankees Projected
K%: 22.0
Whiff rate: 28.0%Team page
Boston Red Sox Projected
K%: 22.0
Whiff rate: 28.0%Team page
Batter vs Pitcher matchup tool

Lineups are projected as of this writing.

New York Yankees K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.

Boston Red Sox K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.

Ballpark, Weather & Umpire

Fenway Park
Run Factor1.08
HR Factor1.15
Full park profile
Home Plate Umpire
Austin Jones
Average NRFI: 50.0% 36 games
Full umpire profile
Hourly Game Forecast
45°
6 PM
11 mph
ESE
42°
7 PM
10 mph
ESE
42°
8 PM
10 mph
ESE
42°
9 PM
10 mph
ESE
  • Fenway Park carries a 1.08 run factor (hitter-friendly).
  • Home run factor: 1.15 — the park elevates HR power.
  • Park notes: Green Monster (37ft wall in left field); Pesky's Pole (302ft in right field); Triangle in center field.
  • First pitch forecast: 45F with 11 mph winds from the ESE. Humidity: 45%.
  • Wind advisory: 11 mph winds from the ESE may impact fly balls.
  • Home plate umpire: Austin Jones.
  • Career NRFI rate: 50.0% across 36 games tracked.
  • Zone tendency: Average.
  • K factor: 1.018 (league average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 4.4 combined runs, with New York Yankees projected for 2.3 and Boston Red Sox for 2.1.
  • That's 4.1 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.
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. Confirm lineups at first pitch. 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.