BAL vs BOS prediction for July 20, 2026: Our Monte Carlo simulation ran 10,000 game iterations and projects BOS 5.9 - BAL 5.6. BOS is favored with a 52.9% win probability. The run line is -1.5 and the total is 8.5. Model projects 11.5 total runs.
BOS
5.9
Projected Score
VS
O/U 8.5
BAL
5.6
Projected Score
Win Probability
BOSBAL
-1.5
Run Line (BOS)
8.5
Total Line
10,000
Simulations
Calibrated accuracy at this confidence: 53.4% (2,956 games)
Projected Runs Range 10th – 90th percentile
BAL
468
BOS
468
Projected
BOS 5.9 — BAL 5.6
Actual
BOS 6 — BAL 5
Starting Pitcher Matchup
Shane Baz R
BAL
usagewhiffbar labels show usage · mph
FF34%96 mph13% whiff
KC33%85 mph27% whiff
FC17%90 mph20% whiff
Payton Tolle L
BOS
usagewhiffbar labels show usage · mph
FF48%96 mph25% whiff
SI22%95 mph9% whiff
FC18%88 mph25% whiff
Weather Impact
Fenway Park
82°F10 mph wind
HR: 1.071 Total: 1.039
8mph out
Bullpen Comparison
BAL
4.34ERA
4.01FIP
8.76K/9
3.44BB/9
1.30WHIP
BOS
3.90ERA
4.18FIP
9.00K/9
3.45BB/9
1.30WHIP
Betting Edges
First 5 Innings & NRFI
BAL F5
2.9 runs
39.7% win
BOS F5
3.3 runs
48.4% win
F5 Total
6.2
NRFI
51.4%
YRFI
48.6%
Avg 1st Inn Runs
1.15
HR Spotlight
Injury Report
BAL8 injured
Samuel Basallo CDAY-TO-DAY
Ryan Helsley RP60-DAY-IL
Chris Bassitt SP60-DAY-IL
Blaze Alexander 3B10-DAY-IL
Keegan Akin RP60-DAY-IL
Felix Bautista RP60-DAY-IL
+2 more
BOS8 injured
Tanner Houck SP60-DAY-IL
Johan Oviedo SP60-DAY-IL
Marcelo Mayer 2B10-DAY-IL
Isiah Kiner-Falefa 2B10-DAY-IL
Connelly Early SP15-DAY-IL
Ranger Suarez SP15-DAY-IL
+2 more
AI Intelligence Analysis
LEAN +1
Model projects 11.49 total (67.1% OVER 8.5) with 21.5% edge. High-edge zone (YELLOW 50.1% WR) but justified here: both teams explosive offensively. Payton Tolle (9.2 K/9, 0.589 overall, B grade) vs Shane Baz (7.3 K/9, 0.43 overall, B- grade) — slight edge to home (Tolle). Fenway park factor 1.071 (HR boost +7%) + 8mph tail wind (1.039x total multiplier) = significant run environment boost. Lean OVER with moderate confidence.
Key Factors
- Pitcher K-rate: Tolle 9.2 K/9 (solid) vs Baz 7.3 K/9 — +1.9 K/9 to home favors strikeout environment, should lower scoring but model projects 11.49 (run support exceeds SP quality)
- Fenway park: 1.071 HR multiplier (70% above neutral) + 8mph tail wind (6.2 total multiplier boost) = run environment heavily inflated. Model accounts for this
- Offensive lineups: BAL has Pete Alonso (30% HR prob) and Coby Mayo (28.3%, .423 ISO). BOS has Willson Contreras (29.6% HR prob, .248 ISO). Both teams can score
- F5 OVER 4.5 shows 9.0% edge at 61.3% prob — this is the cleaner signal (moderate edge, reasonable prob)
- Market-model issue: Model says 55.1% OVER prob, but market implies 60.6% (strong OVER faith). Market is ahead of model on runs
Risk Factors
- High-edge total (21.5%) correlates with 50.1% zone WR — expect flat outcomes despite large edge
- BAL: Adley Rutschman (C) on 10-day IL (wrist) — backup catching plan may slightly reduce run environment vs market expectations
- BOS: Multiple IL injuries (Story SS 60-day, Casas 1B 60-day) — lineup depth compromised despite Contreras presence
HIGH EDGE WARNINGPARK FACTORWEATHER IMPACTPITCHER K MISMATCHF5 VALUE
Edge Analysis
Moneyline
BOS 52.9%
-2.0 pts
Run Line
-1.5
-2.0 pts
Total
8.5
+21.5 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. Probabilities are calibrated using Bayesian methods and sized via the Kelly Criterion. Full methodology →