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Early Preview Lineups: Projected Odds Posted 6 min read

San Diego Padres vs San Francisco Giants Preview

San Diego Padres visit San Francisco Giants at Oracle Park. Randy Vásquez opposes Trevor McDonald in low-scoring matchup at pitcher-friendly venue

San Diego Padres at San Francisco Giants MLB game preview for May 4, 2026
SD
San Diego Padres
Randy Vásquez RHP
@
9:45 PM ET
Oracle Park
SF
San Francisco Giants
Trevor McDonald RHP
Last updated Monday, May 4, 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
Monday, May 4, 2026
First Pitch
9:45 PM ET
Venue
Oracle Park
Probable Starters
Randy Vásquez (RHP) vs Trevor McDonald (RHP)
Lineups
Projected
Odds Snapshot
May 4, 9:46 PM ET
Last Updated
May 4, 6:05 PM ET

Betting Board

Snapshot May 4, 9:46 PM ET
Moneyline
SD -130
SF +118
Total
Over 8 -110
Under 8 -110
Run Line
SD -1.5 +126
SF +1.5 -152

Model Angles

NRFI Model
NRFI · 55%
+2.4% edge
Projected Total
4.4
model combined runs
Park Factor
0.93
Pitcher friendly · HR 0.86
First Pitch Weather
60°F
11.7 mph WNW
The San Diego Padres visit Oracle Park on Monday night to open a series against the San Francisco Giants, with Randy Vásquez taking the mound opposite Trevor McDonald in a 9:45 PM ET first pitch. San Diego enters at 20-13 following a win, while the Giants limp in at 13-21 amid a six-game losing streak. Vásquez carries a 2.94 ERA and 1.16 WHIP with 9.09 strikeouts per nine innings into the assignment. McDonald's major league track record remains largely unestablished. The projected total sits at 4.4 runs with San Diego favored to score 2.3 and San Francisco 2.1. Oracle Park plays to a 0.93 run factor, enhancing the low-scoring environment. Fernando Tatis Jr. brings a 10.9 percent barrel rate for the Padres, while Luis Arraez holds a .334 average against right-handed pitching. Conditions call for 60-degree temperatures with 12 mph winds from the west-northwest.
  • Vásquez posts 2.94 ERA and 1.16 WHIP with 9.09 strikeouts per nine
  • San Diego 20-13 with one-game win streak; San Francisco 13-21 on six-game skid
  • Oracle Park 0.93 run factor with projected total of 4.4 runs

Pitching Matchup

SD Away
Randy Vásquez
RHP · 3-0 · 6 GS
ERA
2.94
WHIP
1.16
K/9
9.09
IP
33.2
Career: 3.95 ERA · 1.36 WHIP · 6.15 K/9
NRFI: 70.8%
1st Inn ERA: 3.82
SF Home
Trevor McDonald
RHP · undefined-undefined · undefined GS
ERA
undefined
WHIP
undefined
K/9
undefined
IP
undefined
Career: 1.50 ERA · 0.89 WHIP · 7.50 K/9
  • K projections: Randy Vásquez at 4.0 (line 3.5)
  • Trevor McDonald projected at 2.8 (line 3.5).
  • Randy Vásquez has a 70.8% career NRFI rate. No first-inning data available for Trevor McDonald.
  • Both starters throw from the R side, limiting platoon splits for either lineup.

Strikeout Projections

Randy Vásquez vs SF
Proj: 4.0Line: 3.5
+0.5
Confidence:
Trevor McDonald vs SD
Proj: 2.8Line: 3.5
-0.7
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.

Randy Vásquez (San Diego Padres) is projected for 4.0 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 22.6% with a 28.0% whiff rate.

Trevor McDonald (San Francisco Giants) is projected for 2.8 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 23.3% with a 28.0% whiff rate.

The San Diego Padres lineup is more vulnerable to strikeouts in this matchup. San Francisco Giants batters K at 22.6%, San Diego Padres batters at 23.3%.

NRFI & First 5 Analysis

NRFI Model
54.8%
probability of NRFI
+2.4%
market edge
Monitor
Market implied: 52.4%Model: 54.8%
First 5 Innings
2.4est. F5 runs
SD
2.94 ERA
5.5 inn/start
SF
— ERA
F5 lean: Slight SF
SD K Projection
Randy Vásquez
4.0proj
Line: 3.5
+0.5 NEUTRAL
Confidence
SF K Projection
Trevor McDonald
2.8proj
Line: 3.5
-0.7 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 54.8% probability of no runs in the first inning, compared to the market's implied probability of 52.4%.

  • That creates a slim 2.4% edge on NRFI.
  • The best available line is NRFI -110 / YRFI -110 at FanDuel.

The home plate umpire for this game has not yet been assigned. MLB typically posts assignments the morning of game day. Umpire data will be added automatically once the assignment is posted.
Our NRFI model sits at 40-39 (50.6%) on official picks this season.

Lineup & Matchup Breakdown

San Diego Padres Projected
K%: 23.3
6Fernando Tatis Jr.RRF
Whiff rate: 28.0%Team page
San Francisco Giants Projected
K%: 22.6
8Luis ArraezL2B
Whiff rate: 28.0%Team page
Batter vs Pitcher matchup tool

Lineups are projected as of this writing.

San Diego Padres K vulnerability: 23.3% strikeout rate, 28.0% whiff rate.

San Francisco Giants K vulnerability: 22.6% strikeout rate, 28.0% whiff rate.

Ballpark, Weather & Umpire

Oracle Park
Run Factor0.93
HR Factor0.86
Full park profile
Hourly Game Forecast
60°
9 PM
12 mph
WNW
58°
10 PM
11 mph
WNW
56°
11 PM
11 mph
WNW
55°
12 AM
11 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: 60F with 12 mph winds from the WNW. Humidity: 63%.
  • Temperature drops from 60F at first pitch to 55F by the late innings.
  • Wind advisory: 12 mph winds from the WNW may impact fly balls.

Home plate umpire: Not yet assigned. Umpire data will be added once the assignment is posted.

Run Projections & Total

  • Our projection model puts the total at 4.4 combined runs, with San Diego Padres projected for 2.3 and San Francisco Giants for 2.1.
  • That's 3.6 runs below the posted total of 8.0, suggesting a lean toward the Under.
  • The run projection is essentially a coin flip between these two teams.
The Bottom Line
San Diego holds significant advantages in form and starting pitching quality in a ballpark that suppresses offense. The projected total of 4.4 runs reflects both the venue and the mismatch between a 20-13 visitor and a reeling 13-21 home side.
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.