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Early Preview Lineups: TBD Odds Posted 5 min read

St. Louis Cardinals vs Pittsburgh Pirates Preview

Cardinals visit Pirates at PNC Park with Dustin May facing Mason Montgomery. St. Louis on four-game slide while Pittsburgh sits at 16-12

St. Louis Cardinals at Pittsburgh Pirates MLB game preview for April 27, 2026
STL
St. Louis Cardinals
Dustin May RHP
@
6:40 PM ET
PNC Park
PIT
Pittsburgh Pirates
Mason Montgomery LHP
Last updated Monday, April 27, 2026
Final This game has finished. Read the recap for final score, model grades, and box score.

Key Facts

Matchup
St. Louis Cardinals at Pittsburgh Pirates
Date
Monday, April 27, 2026
First Pitch
6:40 PM ET
Venue
PNC Park
Probable Starters
Dustin May (RHP) vs Mason Montgomery (LHP)
Lineups
TBD
Odds Snapshot
Apr 27, 6:41 PM ET
Last Updated
Apr 27, 6:08 PM ET

Betting Board

Snapshot Apr 27, 6:41 PM ET
Moneyline
STL +108
PIT -118
Total
Over 8 -118
Under 8 -104
Run Line
STL +1.5 -200
PIT -1.5 +164

Model Angles

NRFI Model
YRFI · 50%
-4.0% edge
Projected Total
TBD
Park Factor
1.00
Neutral · HR 0.98
First Pitch Weather
76°F
10.5 mph SE
The St. Louis Cardinals travel to PNC Park to face the Pittsburgh Pirates on Wednesday evening with first pitch scheduled for 6:40 PM ET. St. Louis enters at 14-13 following a four-game losing streak, while Pittsburgh stands at 16-12 after dropping its most recent contest. Right-hander Dustin May takes the mound for the Cardinals with a 5.84 ERA, 1.54 WHIP, and 7.30 strikeouts per nine innings. The Pirates counter with left-hander Mason Montgomery, who owns a 3.97 ERA, 1.50 WHIP, and an impressive 16.68 strikeouts per nine. May is projected for 4.6 strikeouts against a line of 4.5, while Montgomery is projected for 4.9 strikeouts against a line of 1.5. Weather conditions call for 76 degrees with 10 mph winds from the southeast, and the park factor sits neutral at 1.00 runs.
  • Cardinals have dropped four consecutive games entering Wednesday
  • Mason Montgomery brings 16.68 strikeouts per nine to the mound
  • Dustin May owns a 5.84 ERA through his 2025 starts

Pitching Matchup

STL Away
Dustin May
RHP · 3-2 · 5 GS
ERA
5.84
WHIP
1.54
K/9
7.30
IP
24.2
Career: 4.00 ERA · 1.22 WHIP · 8.18 K/9
NRFI: 66.1%
1st Inn ERA: 5.44
PIT Home
Mason Montgomery
LHP · 1-0 · 1 GS
ERA
3.97
WHIP
1.50
K/9
16.68
IP
11.1
Career: 4.84 ERA · 1.55 WHIP · 13.57 K/9

On the season, Mason Montgomery holds the ERA edge in this matchup. Dustin May carries a 5.84 ERA and 1.54 WHIP, while Mason Montgomery sits at 3.97 ERA and 1.50 WHIP.
Strikeout rates: Dustin May at 7.30 K/9, Mason Montgomery at 16.68 K/9.
K projections: Dustin May at 4.6 (line 4.5)
Mason Montgomery projected at 4.9 (line 1.5).
Dustin May has a 66.1% career NRFI rate. No first-inning data available for Mason Montgomery.
This is a RHP vs LHP matchup, creating potential platoon advantages in both lineups.

Strikeout Projections

Dustin May vs PIT
Proj: 4.6Line: 4.5
+0.1
Confidence:
Mason Montgomery vs STL
Proj: 4.9Line: 1.5
+3.4
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.

Dustin May (St. Louis Cardinals) is projected for 4.6 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.

Mason Montgomery (Pittsburgh Pirates) is projected for 4.9 strikeouts against a posted line of 1.5. 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 St. Louis Cardinals lineup is more vulnerable to strikeouts in this matchup. Pittsburgh Pirates batters K at 22.0%, St. Louis Cardinals batters at 22.0%.

NRFI & First 5 Analysis

NRFI Model
50.1%
probability of YRFI
+-4.0%
market edge
Monitor
Market implied: 54.1%Model: 50.1%
First 5 Innings
STL
5.84 ERA
4.8 inn/start
PIT
3.97 ERA
11.1 inn/start
F5 lean: Moderate PIT
STL K Projection
Dustin May
4.6proj
Line: 4.5
+0.1 NEUTRAL
Confidence
PIT K Projection
Mason Montgomery
4.9proj
Line: 1.5
+3.4 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 50.1% probability of no runs in the first inning, compared to the market's implied probability of 54.1%.

  • That creates a slim -4.0% edge on YRFI.
  • The best available line is NRFI -118 / YRFI -104 at FanDuel.
  • Home plate umpire Chris Segal runs a wide zone. See the umpire section below for full career data.
  • Our NRFI model sits at 29-29 (50.0%) on official picks this season.

Prop Edges

3 model signals detected
Home Run Elite 0.5
16%
Home Run Very Strong 0.5
14.4%
Home Run Strong 0.5
12.1%
See all today's picks and edges

Lineup & Matchup Breakdown

St. Louis Cardinals Projected
Projected batting order unavailable. This will update when probable or confirmed lineup data is available.
Pittsburgh Pirates Projected
Projected batting order unavailable. This will update when probable or confirmed lineup data is available.
Batter vs Pitcher matchup tool

Lineups are unavailable as of this writing.

Ballpark, Weather & Umpire

PNC Park
Run Factor1.00
HR Factor0.98
Full park profile
Home Plate Umpire
Chris Segal
Slightly wide NRFI: 51.7% 89 games
Full umpire profile
Hourly Game Forecast
76°
6 PM
11 mph
SE
74°
7 PM
12 mph
ESE
74°
8 PM
12 mph
ESE
74°
9 PM
12 mph
ESE
  • PNC Park carries a 1.00 run factor (neutral).
  • Home run factor: 0.98 — the park neutral for HR power.
  • Park notes: Right field wall angles; Elevated RF corner; Allegheny River backdrop.
  • First pitch forecast: 76F with 10 mph winds from the SE. Humidity: 27%.
  • Wind advisory: 10 mph winds from the SE may impact fly balls.
  • Home plate umpire: Chris Segal.
  • Career NRFI rate: 51.7% across 89 games tracked.
  • Zone tendency: Slightly wide.
  • K factor: 0.998 (league average strikeouts in his games).

Run Projections & Total

Run projections not available for this game.

The Bottom Line
St. Louis looks to snap its four-game skid against a Pirates team that has won five of its last six series. Montgomery's strikeout rate stands out significantly, while May continues working through elevated ERA and WHIP numbers for the Cardinals rotation.
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.