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Early Preview Lineups: Confirmed Odds Posted 7 min read

San Diego Padres vs San Francisco Giants Preview

SD at SF 2026-09-12 preview: probable pitchers, projected lineups, NRFI/F5 model picks, weather, ballpark, and umpire context.

San Diego Padres at San Francisco Giants MLB game preview for September 12, 2026
SD
San Diego Padres
Michael King RHP
@
4:05 PM ET
Oracle Park
SF
San Francisco Giants
Cesar Perdomo LHP
Last updated Saturday, September 12, 2026
Final This game has finished. Read the recap for final score, model grades, and box score.

Key Facts

Matchup
San Diego Padres at San Francisco Giants
Date
Saturday, September 12, 2026
First Pitch
4:05 PM ET
Venue
Oracle Park
Probable Starters
Michael King (RHP) vs Cesar Perdomo (LHP)
Lineups
Confirmed
Odds Snapshot
Sep 12, 4:06 PM ET
Last Updated
Sep 12, 7:25 AM ET

Betting Board

Snapshot Sep 12, 4:06 PM ET
Moneyline
SD -176
SF +161
Total
Over 7.5 -122
Under 7.5 +100
Run Line
SD -1.5 -105
SF +1.5 -113

Model Angles

NRFI Model
YRFI · 53%
-4.6% edge
Projected Total
5.0
model combined runs
Park Factor
0.93
Pitcher friendly · HR 0.86
First Pitch Weather
70°F
12.2 mph W
San Diego brings a five-game winning streak to Oracle Park for a late-afternoon test against a Giants club that has dropped its last outing. The Padres sit at 79-68 and have clearly found a rhythm down the stretch, while San Francisco's 62-86 ledger reflects a long season winding down. Michael King takes the ball for the visitors with a 3.00 ERA, 1.17 WHIP and 7.71 strikeouts per nine innings. Cesar Perdomo counters with tiny-sample brilliance: 0.90 ERA, 0.80 WHIP, and 7.20 strikeouts per nine. Those gaudy lines come with obvious caveat about innings logged. The total sits at 5.0, with San Diego projected for 2.4 runs and the Giants 2.6. Oracle Park brings a 0.93 run factor, so pitcher-friendly territory supports the low number. Wind blows in from the west-northwest at 19 miles per hour under 67 degrees, adding another layer of run suppression. The strikeout market shows King projected at 4.0 against a line of 4.5 and Perdomo at 2.4 versus 3.5, both carrying neutral five-out-of-ten confidence. Neither K model flags a clear edge. The NRFI model does. It sits at 53 percent probability with a 5.9 percent edge, and King's first-inning database shows an 81 percent NRFI rate across 32 starts. Recent Oracle Park trends point the other way: NRFI has cashed 60 percent of the time in the last ten games, but the total has averaged 6.6 runs and the over has gone just 43 percent. San Diego's barrel-rate leaders include Fernando Tatis Jr. at 14.8 percent, Xander Bogaerts at 13.5 percent, and Jackson Merrill at 8.6 percent. Bullpen fatigue splits sharply: San Diego is fully fresh at 100 out of 100, while the Giants are at 44 with Yunior Marte unavailable.
  • NRFI model shows 53 percent probability, 5.9 percent edge
  • Michael King 81 percent NRFI rate across 32 starts
  • Oracle Park 0.93 run factor, 19 mph wind

Pitching Matchup

SD Away
Michael King
RHP · 10-9 · 30 GS
ERA
3.03
WHIP
1.15
K/9
7.61
IP
175.0
Career: 3.19 ERA · 1.18 WHIP · 9.50 K/9
NRFI: 77.4%
1st Inn ERA: 3.40
SF Home
Cesar Perdomo
LHP · 0-0 · 2 GS
ERA
3.68
WHIP
1.36
K/9
6.75
IP
14.2
Career: 3.68 ERA · 1.36 WHIP · 6.75 K/9

On the season, Michael King holds the ERA edge in this matchup. Michael King carries a 3.03 ERA and 1.15 WHIP, while Cesar Perdomo sits at 3.68 ERA and 1.36 WHIP.
Strikeout rates: Michael King at 7.61 K/9, Cesar Perdomo at 6.75 K/9.
K projections: Michael King at 3.7 (line 4.5)
Cesar Perdomo projected at 2.4 (line 3.5).
Michael King has a 77.4% career NRFI rate. No first-inning data available for Cesar Perdomo.
This is a RHP vs LHP matchup, creating potential platoon advantages in both lineups.

Strikeout Projections

Michael King vs SF
Proj: 3.7Line: 4.5
-0.8
Confidence:
Cesar Perdomo vs SD
Proj: 2.4Line: 3.5
-1.1
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.

Michael King (San Diego Padres) is projected for 3.7 strikeouts against a posted line of 4.5. The projection is close to the line with no actionable edge.
He faces a high-K lineup that strikes out at 25.1% with a 28.0% whiff rate.

Cesar Perdomo (San Francisco Giants) is projected for 2.4 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 23.1% with a 28.0% whiff rate.

The San Francisco Giants lineup is more vulnerable to strikeouts in this matchup. San Francisco Giants batters K at 25.1%, San Diego Padres batters at 23.1%.

NRFI & First 5 Analysis

NRFI Model
53.4%
probability of YRFI
+-4.6%
market edge
Monitor
Market implied: 58.0%Model: 53.4%
First 5 Innings
2.8est. F5 runs
SD
3.03 ERA
5.8 inn/start
SF
3.68 ERA
7.1 inn/start
F5 lean: Slight SD
SD K Projection
Michael King
3.7proj
Line: 4.5
-0.8 NEUTRAL
Confidence
SF K Projection
Cesar Perdomo
2.4proj
Line: 3.5
-1.1 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 53.4% probability of no runs in the first inning, compared to the market's implied probability of 58.0%.

  • That creates a slim -4.6% edge on YRFI.
  • The best available line is NRFI -138 / YRFI +104 at FanDuel.
  • Home plate umpire Jordan Baker runs a average zone. See the umpire section below for full career data.
  • Our NRFI model sits at 154-136 (53.1%) on official picks this season.

Prop Edges

1 model signal detected
Home Run Very Strong 0.5
13.8%
See all today's picks and edges

Lineup & Matchup Breakdown

San Diego Padres Confirmed
K%: 23.1
1Fernando Tatis Jr.R2B
5Jackson MerrillLCF
7Xander BogaertsRSS
Whiff rate: 28.0%Team page
San Francisco Giants Confirmed
K%: 25.1
2Rafael DeversLDH
Whiff rate: 28.0%Team page
Batter vs Pitcher matchup tool

Lineups are confirmed as of this writing.

San Diego Padres K vulnerability: 23.1% strikeout rate, 28.0% whiff rate.

San Francisco Giants K vulnerability: 25.1% strikeout rate, 28.0% whiff rate.

Ballpark, Weather & Umpire

Oracle Park
Run Factor0.93
HR Factor0.86
Full park profile
Home Plate Umpire
Jordan Baker
Slightly wide NRFI: 42.9% 7 games
Full umpire profile
Hourly Game Forecast
70°
4 PM
12 mph
W
68°
5 PM
17 mph
WNW
67°
6 PM
18 mph
WNW
66°
7 PM
18 mph
WNW
  • Oracle Park carries a 0.93 run factor (pitcher-friendly).
  • Home run factor: 0.86 — the park suppresses HR power.
  • Park notes: McCovey Cove in right field; Bay breezes suppress HRs; Chilly climate.
  • First pitch forecast: 70F with 12 mph winds from the W. Humidity: 65%.
  • Temperature drops from 70F at first pitch to 66F by the late innings.
  • Wind advisory: 12 mph winds from the W may impact fly balls.
  • Home plate umpire: Jordan Baker.
  • Career NRFI rate: 42.9% across 7 games tracked.
  • Zone tendency: Slightly wide.
  • K factor: 0.946 (below average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 5.0 combined runs, with San Diego Padres projected for 2.4 and San Francisco Giants for 2.6.
  • That's 2.5 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
The NRFI carries a modest 5.9 percent edge backed by King's 81 percent first-inning shutout rate and park conditions that favor pitchers. Wind and a sub-1.00 run factor reinforce the low projected total of 5.0, but Oracle's recent ten-game sample averaged 6.6 runs and the over still hit only 43 percent of the time. Perdomo's minuscule 0.90 ERA screams sample-size caution, and the strikeout models see no value on either side. San Diego's bullpen arrives fully rested while San Francisco sits at 44 out of 100, which could matter late if Perdomo exits early. The NRFI is the cleanest angle here, not a sure thing but a defensible lean given King's track record and the park profile.
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.