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Early Preview Lineups: Confirmed Odds Posted 6 min read

Miami Marlins vs San Diego Padres Preview

MIA at SD 2026-09-19 preview: probable pitchers, projected lineups, NRFI/F5 model picks, weather, ballpark, and umpire context.

Miami Marlins at San Diego Padres MLB game preview for September 19, 2026
MIA
Miami Marlins
Eury Pérez RHP
@
8:40 PM ET
Petco Park
SD
San Diego Padres
Casey Mize RHP
Last updated Saturday, September 19, 2026
Final This game has finished. Read the recap for final score, model grades, and box score.

Key Facts

Matchup
Miami Marlins at San Diego Padres
Date
Saturday, September 19, 2026
First Pitch
8:40 PM ET
Venue
Petco Park
Probable Starters
Eury Pérez (RHP) vs Casey Mize (RHP)
Lineups
Confirmed
Odds Snapshot
Sep 19, 8:40 PM ET
Last Updated
Sep 19, 6:21 PM ET

Betting Board

Snapshot Sep 19, 8:40 PM ET
Moneyline
MIA +140
SD -152
Total
Over 7.5 -107
Under 7.5 -113
Run Line
MIA +1.5 -169
SD -1.5 +139

Model Angles

NRFI Model
NRFI · 54%
+2.3% edge
Projected Total
5.2
model combined runs
Park Factor
0.96
Neutral · HR 0.92
First Pitch Weather
75°F
7.4 mph WNW
The Miami Marlins visit the San Diego Padres at 8:40 PM ET at Petco Park. Probable starters: Eury Pérez for Miami Marlins opposite Casey Mize for San Diego Padres. 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: Eury Pérez (Miami Marlins) vs Casey Mize (San Diego Padres).
  • Lineup status: confirmed by both teams.
  • NRFI model: 54% probability, lean NRFI, +2.3% edge.

Pitching Matchup

MIA Away
Eury Pérez
RHP · 7-11 · 27 GS
ERA
3.99
WHIP
1.24
K/9
9.67
IP
144.1
Career: 3.83 ERA · 1.15 WHIP · 10.01 K/9
NRFI: 71.0%
1st Inn ERA: 5.34
SD Home
Casey Mize
RHP · 6-9 · 24 GS
ERA
3.69
WHIP
1.14
K/9
7.75
IP
124.1
Career: 4.08 ERA · 1.26 WHIP · 7.53 K/9
NRFI: 83.9%
1st Inn ERA: 1.88

On the season, Casey Mize holds the ERA edge in this matchup. Eury Pérez carries a 3.99 ERA and 1.24 WHIP, while Casey Mize sits at 3.69 ERA and 1.14 WHIP.
Strikeout rates: Eury Pérez at 9.67 K/9, Casey Mize at 7.75 K/9.
K projections: Eury Pérez at 3.1 (line 5.5)
Casey Mize projected at 2.8 (line 4.5).
First-inning scoring: Eury Pérez holds a 71.0% career NRFI rate, Casey Mize at 83.9%. Combined average: 77.5%.
Both starters throw from the R side, limiting platoon splits for either lineup.

Strikeout Projections

Eury Pérez vs SD
Proj: 3.1Line: 5.5
-2.4
Confidence:
Casey Mize vs MIA
Proj: 2.8Line: 4.5
-1.7
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.

Eury Pérez (Miami Marlins) is projected for 3.1 strikeouts against a posted line of 5.5. The projection sits 2.4 K below the line, giving the model an Under lean.
He faces a moderate-K lineup that strikes out at 22.8% with a 28.0% whiff rate.

Casey Mize (San Diego Padres) is projected for 2.8 strikeouts against a posted line of 4.5. The projection sits 1.7 K below the line, giving the model an Under lean.
He faces a moderate-K lineup that strikes out at 22.9% with a 28.0% whiff rate.

The Miami Marlins lineup is more vulnerable to strikeouts in this matchup. San Diego Padres batters K at 22.8%, Miami Marlins batters at 22.9%.

NRFI & First 5 Analysis

NRFI Model
54.0%
probability of NRFI
+2.3%
market edge
Monitor
Market implied: 51.7%Model: 54.0%
First 5 Innings
2.9est. F5 runs
MIA
3.99 ERA
5.3 inn/start
SD
3.69 ERA
5.2 inn/start
F5 lean: Even matchup
MIA K Projection
Eury Pérez
3.1proj
Line: 5.5
-2.4 UNDER
Confidence
SD K Projection
Casey Mize
2.8proj
Line: 4.5
-1.7 UNDER
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 54.0% probability of no runs in the first inning, compared to the market's implied probability of 51.7%.

  • That creates a slim 2.3% edge on NRFI.
  • The best available line is NRFI -107 / YRFI -113 at DraftKings.
  • Home plate umpire Tripp Gibson runs a tight zone. See the umpire section below for full career data.
  • Our NRFI model sits at 158-148 (51.6%) on official picks this season.

Prop Edges

4 model signals detected
Casey MizeSignal
Strikeouts Under 4.5
Home Run Very Strong 0.5
13.8%
Eury Pérez
Strikeouts Under 5.5
Home Run Very Strong 0.5
13.8%
See all today's picks and edges

Lineup & Matchup Breakdown

Miami Marlins Confirmed
K%: 22.9
Whiff rate: 28.0%Team page
San Diego Padres Confirmed
K%: 22.8
1Fernando Tatis Jr.R2B
3Manny MachadoR3B
Whiff rate: 28.0%Team page
Batter vs Pitcher matchup tool

Lineups are confirmed as of this writing.

Miami Marlins K vulnerability: 22.9% strikeout rate, 28.0% whiff rate.

San Diego Padres K vulnerability: 22.8% strikeout rate, 28.0% whiff rate.

Ballpark, Weather & Umpire

Petco Park
Run Factor0.96
HR Factor0.92
Full park profile
Home Plate Umpire
Tripp Gibson
Average NRFI: 50.0% 8 games
Full umpire profile
Hourly Game Forecast
75°
8 PM
7 mph
WNW
73°
9 PM
7 mph
NW
71°
10 PM
5 mph
NW
69°
11 PM
2 mph
NW
  • 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: 75F with 7 mph winds from the WNW. Humidity: 64%.
  • Temperature drops from 75F at first pitch to 69F by the late innings.
  • Home plate umpire: Tripp Gibson.
  • Career NRFI rate: 50.0% across 8 games tracked.
  • Zone tendency: Average.
  • K factor: 1.141 (above average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 5.2 combined runs, with Miami Marlins projected for 2.6 and San Diego Padres for 2.5.
  • That's 2.3 runs below the posted total of 7.5, 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.