ATL vs WSH prediction for April 21, 2026: Our Monte Carlo simulation ran 10,000 game iterations and projects WSH 2.7 - ATL 4.1. ATL is favored with a 63.8% win probability. The run line is 1.5 and the total is 8.5. Model projects 6.8 total runs.
WSH
2.7
Projected Score
VS
O/U 8.5
ATL
4.1
Projected Score
Win Probability
WSHATL
+1.5
Run Line (WSH)
8.5
Total Line
10,000
Simulations
ATLWSH L5
Calibrated accuracy at this confidence: 65.3% (2,040 games)
Projected Runs Range 10th – 90th percentile
ATL
246
WSH
135
Pick Results
Mauricio Dubon OVER 0.5 Strikeoutsbatter_ksLOSS-1.50u
Starting Pitcher Matchup
Reynaldo López R
ATL
FF52%93 mph11% whiff
SL32%83 mph30% whiff
CU11%73 mph29% whiff
Foster Griffin L
WSH
FC29%88 mph17% whiff
FF19%92 mph12% whiff
ST13%80 mph24% whiff
Weather Impact
Nationals Park
62°F9 mph wind
HR: 0.977 Total: 0.986
neutral
Bullpen Comparison
ATL
1.87ERA
2.45FIP
9.69K/9
2.10BB/9
0.92WHIP
WSH
5.48ERA
5.42FIP
7.96K/9
4.40BB/9
1.48WHIP
Betting Edges
RUN_LINE HOME +1.5
-48.2% EV
-128
TOTAL OVER 8.5
-33.8% EV
-115
TOTAL UNDER 8.5
+28.3% EV
-105
F5 UNDER 4.5
+21.1% EV
-114
NRFI NRFI
+19.0% EV
-102
F5_ML HOME
-16.5% EV
+106
First 5 Innings & NRFI
ATL F5
2.1 runs
49.3% win
WSH F5
1.5 runs
30.0% win
F5 Total
3.6
NRFI
63.3%
YRFI
36.7%
Avg 1st Inn Runs
0.68
HR Spotlight
Avg HRs
1.8
Over 0.5 HR
84%
Over 1.5 HR
55%
No HR
16%
Matt Olson ATL30.0%
ISO: 0.355 | Barrel: 17.9% | vs Foster Griffin
Austin Riley ATL30.0%
ISO: 0.200 | Barrel: 7.3% | vs Foster Griffin | Platoon: 1.12x
CJ Abrams WSH30.0%
ISO: 0.392 | Barrel: 15.6% | vs Reynaldo López | Platoon: 1.12x
Pitcher Strikeout Projections
Reynaldo López
0.0 K projected
ATL | K/9: 0.0
Foster Griffin
0.0 K projected
WSH | K/9: 0.0
Injury Report
ATL8 injured
Raisel Iglesias RP15-DAY-IL
Sean Murphy C10-DAY-IL
Spencer Strider SP15-DAY-IL
Ha-Seong Kim SS10-DAY-IL
Danny Young RP60-DAY-IL
Blake Burkhalter RPDAY-TO-DAY
+2 more
WSH8 injured
Josiah Gray SP60-DAY-IL
Cole Henry RP15-DAY-IL
Ken Waldichuk RP60-DAY-IL
Trevor Williams SP60-DAY-IL
Jarlin Susana RPDAY-TO-DAY
Travis Sykora SPDAY-TO-DAY
+2 more
AI Intelligence Analysis
LEAN +1GREEN ZONE56.2% WR (n=96)
ATL away favorite (63.8% model prob) with 3.5% ML edge in actionable range; Reynaldo López (WSH, 2.35 ERA, poor stuff 25.7% K) vs Foster Griffin (ATL, 3.29 ERA, better control 22% BB) gives ATL pitching edge despite lower sample. Away favorite GREEN zone 62.7% WR.
Key Factors
- ATL away favorite: 62.7% WR historically (combo|away|favorite = 75.0% WR for true edges)
- Reynaldo López (WSH, 2.35 ERA) has lower ERA but 9.7% BB rate = control issues; 'stuff' grade C = below average
- Foster Griffin (ATL, 3.29 ERA) with B-grade command (59.6%) controls ball better
- Nationals 36.2% model win prob heavily underpriced by market (131 dogs) — reverse implied (43.1%) vs model
Risk Factors
- López ERA low but command weak (9.7% BB) — could give up bases
- ATL weak overall record but model sees value in away favored positioning
- Cold weather (61.6F) slightly suppresses runs but not game-changing
PITCHER ADVANTAGEAWAY FAVORITEGREEN ZONE
Edge Analysis
Moneyline
ATL 63.8%
-48.2 pts
Run Line
+1.5
-48.2 pts
Total
8.5
+28.3 pts
How this prediction was generated: This page shows output from the Olympus Bets MLB Baseball Monte Carlo engine. Each game is simulated 10,000 times using real-time team data, injury reports, and current odds. Probabilities are calibrated using Bayesian methods and sized via the Kelly Criterion. Full methodology →