Early Preview Lineups: Probable Odds Pending 6 min read

St. Louis Cardinals vs Washington Nationals Preview

St. Louis Cardinals vs Washington Nationals preview with model projections: Michael McGreevy projected 4.8 K (line 3.5), NRFI probability 40%. Full breakdown inside.

St. Louis Cardinals at Washington Nationals MLB game preview for April 8, 2026
STL
St. Louis Cardinals
Michael McGreevy RHP
@
4:05 PM ET
Nationals Park
WSH
Washington Nationals
Miles Mikolas RHP
Last updated Wednesday, April 8, 2026

Key Facts

Matchup
St. Louis Cardinals at Washington Nationals
Date
Wednesday, April 8, 2026
First Pitch
4:05 PM ET
Venue
Nationals Park
Probable Starters
Michael McGreevy (RHP) vs Miles Mikolas (RHP)
Lineups
Probable
Last Updated
Apr 7, 10:12 PM ET

Betting Board

Lines not yet posted
Sportsbooks have not published markets for this matchup yet. Check back closer to first pitch, or see today's model-backed picks.

Model Angles

NRFI Model
YRFI · 40%
-20.3% edge
Projected Total
5.3
model combined runs
Park Factor
0.99
Neutral · HR 0.96
First Pitch Weather
55°F
5.5 mph ESE
Miles Mikolas takes the mound for Washington sporting a catastrophic 14.46 ERA through his first two starts, having surrendered 13 earned runs across just eight innings of work. The veteran right-hander's 2.25 WHIP reveals the constant trouble he's navigated, with opposing hitters teeing off on a pitcher who has clearly lost command of his arsenal. Facing him is St. Louis's Michael McGreevy, who presents the polar opposite profile with a stellar 2.53 ERA and a miserly 0.84 WHIP that demonstrates his ability to limit baserunners. The Cardinals' young right-hander has given his offense every opportunity to cash in during his starts, though St. Louis arrives at Nationals Park in middling form at 5-5 over their last ten. Washington snapped a rough stretch with a win in their most recent outing, but asking Mikolas to suddenly rediscover effectiveness against his former organization feels like a tall order. The 36-year-old spent seven seasons in St. Louis and knows these hitters intimately, yet familiarity won't fix mechanics or restore lost velocity. With temperatures in the mid-50s and minimal wind impact at a neutral ballpark, conditions won't bail out Washington's struggling starter. The pitching matchup alone screams Cardinals advantage, and McGreevy should cruise against a Nationals lineup that ranks near the bottom in most offensive categories. The full breakdown examines whether St. Louis can capitalize on this favorable spot.
  • Starter matchup: Michael McGreevy (St. Louis Cardinals) vs Miles Mikolas (Washington Nationals).
  • Lineup status: projected until official release.
  • NRFI model: 40% probability, lean YRFI, -20.3% edge.

Pitching Matchup

STL Away
Michael McGreevy
RHP · 0-1 · 3 GS
ERA
2.16
WHIP
0.78
K/9
5.40
IP
16.2
Career: 3.72 ERA · 1.12 WHIP · 5.72 K/9
NRFI: 57.9%
1st Inn ERA: 4.74
WSH Home
Miles Mikolas
RHP · 0-2 · 3 GS
ERA
12.41
WHIP
2.35
K/9
8.03
IP
12.1
Career: 4.32 ERA · 1.23 WHIP · 6.45 K/9
NRFI: 66.3%
1st Inn ERA: 5.55

On the season, Michael McGreevy holds the ERA edge in this matchup. Michael McGreevy carries a 2.16 ERA and 0.78 WHIP, while Miles Mikolas sits at 12.41 ERA and 2.35 WHIP.
Strikeout rates: Michael McGreevy at 5.40 K/9, Miles Mikolas at 8.03 K/9.
K projections: Michael McGreevy at 4.8 (line 3.5)
Miles Mikolas projected at 3.4 (line 3.5).
First-inning scoring: Michael McGreevy holds a 57.9% career NRFI rate, Miles Mikolas at 66.3%. Combined average: 62.1%.
Both starters throw from the R side, limiting platoon splits for either lineup.

Strikeout Projections

Michael McGreevy vs WSH
Proj: 4.8Line: 3.5
+1.3
Confidence:
Miles Mikolas vs STL
Proj: 3.4Line: 3.5
-0.1
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 McGreevy (St. Louis Cardinals) is projected for 4.8 strikeouts against a posted line of 3.5. The projection sits 1.3 K above the line, giving the model a Neutral lean at 4/10 confidence.
Win probability on this lean: 50%.
He faces a high-K lineup that strikes out at 24.6% with a 28.3% whiff rate.

Miles Mikolas (Washington Nationals) is projected for 3.4 strikeouts against a posted line of 3.5. The projection sits 0.1 K below the line, giving the model a Neutral lean at 4/10 confidence.
Win probability on this lean: 50%.
He faces a low-K lineup that strikes out at 16.0% with a 23.6% whiff rate.

The Washington Nationals lineup is more vulnerable to strikeouts in this matchup. Washington Nationals batters K at 24.6%, St. Louis Cardinals batters at 16.0%.

NRFI & First 5 Analysis

NRFI Model
40.0%
probability of YRFI
+-20.3%
market edge
Monitor
Market implied: 60.3%Model: 40.0%
First 5 Innings
2.9est. F5 runs
STL
2.16 ERA
5.4 inn/start
WSH
12.41 ERA
4.0 inn/start
F5 lean: Strong STL
STL K Projection
Michael McGreevy
4.8proj
Line: 3.5
+1.3 NEUTRAL
Confidence
WSH K Projection
Miles Mikolas
3.4proj
Line: 3.5
-0.1 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 40.0% probability of no runs in the first inning, compared to the market's implied probability of 60.3%.

  • That creates a slim -20.3% edge on YRFI.
  • The best available line is NRFI -152 / YRFI +114 at FanDuel.
  • Publication tier: slate_only.
  • Home plate umpire Scott Barry runs a tight zone. See the umpire section below for full career data.
  • Our NRFI model sits at 12-11 (52.2%) on official picks this season.

Prop Edges

4 model signals detected
Iván HerreraStrong Signal
Hits
69.6%
Hits
64.5%
Hits
64.1%
Home Run Very Strong 0.5
13.7%
See all today's picks and edges

Lineup & Matchup Breakdown

St. Louis Cardinals Projected
K%: 16.0
1Iván HerreraRC
2Alec BurlesonL1B
Whiff rate: 23.6%Team page
Washington Nationals Projected
K%: 24.6
1James WoodLLF
3Daylen LileLRF
Whiff rate: 28.3%Team page
Batter vs Pitcher matchup tool

Lineups are projected as of this writing.

Lineup K vulnerability: 16.0% strikeout rate, 23.6% whiff rate.

Lineup K vulnerability: 24.6% strikeout rate, 28.3% whiff rate.

Ballpark, Weather & Umpire

Nationals Park
Run Factor0.99
HR Factor0.96
Full park profile
Home Plate Umpire
Scott Barry
Slightly tight NRFI: 59.0% 61 games
Full umpire profile
Hourly Game Forecast
55°
4 PM
6 mph
ESE
55°
5 PM
5 mph
ESE
54°
6 PM
7 mph
E
52°
7 PM
8 mph
ESE
  • Nationals Park carries a 0.99 run factor (neutral).
  • Home run factor: 0.96 — the park neutral for HR power.
  • Park notes: Potomac River proximity; Humid DC climate; Relatively neutral dimensions.

First pitch forecast: 55F with 6 mph winds from the ESE. Humidity: 22%.

  • Home plate umpire: Scott Barry.
  • Career NRFI rate: 59.0% across 61 games tracked.
  • Zone tendency: Slightly tight.
  • K factor: 0.917 (below average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 5.3 combined runs, with St. Louis Cardinals projected for 2.6 and Washington Nationals for 2.6.
  • That's 2.2 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 Cardinals are the sharp play here with Miles Mikolas sporting a horrendous 14.46 ERA and 2.25 WHIP for Washington, while St. Louis counters with Michael McGreevy's solid 2.53 ERA and 0.84 WHIP. Back St. Louis on the moneyline and consider the under given the cold 54-degree weather that suppresses offense at neutral Nationals Park.
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.