BOS vs CLE prediction for May 30, 2026: Our Monte Carlo simulation ran 10,000 game iterations and projects CLE 4.5 - BOS 3.6. CLE is favored with a 62.2% win probability. The run line is -1.5 and the total is 6.5. Model projects 8.1 total runs.
CLE
4.5
Projected Score
VS
O/U 6.5
BOS
3.6
Projected Score
Win Probability
CLEBOS
-1.5
Run Line (CLE)
6.5
Total Line
10,000
Simulations
BOS L5CLE
Calibrated accuracy at this confidence: 58.9% (2,300 games)
Projected Runs Range 10th – 90th percentile
BOS
246
CLE
346
Projected
CLE 4.5 — BOS 3.6
Actual
CLE 1 — BOS 9
Pick Results
Rhys Hoskins OVER 0.5 Hitsbatter_hitsLOSS-1.00u
Angel Martínez OVER 0.5 Hitsbatter_hitsLOSS-1.50u
Starting Pitcher Matchup
Sonny Gray R
BOS
FC24%89 mph9% whiff
CU19%80 mph30% whiff
SI19%92 mph19% whiff
Parker Messick L
CLE
FF30%94 mph19% whiff
CH25%85 mph43% whiff
SI16%92 mph8% whiff
Weather Impact
Progressive Field
64°F16 mph wind
HR: 1.052 Total: 1.029
7mph out
Bullpen Comparison
BOS
3.75ERA
4.22FIP
9.12K/9
3.43BB/9
1.26WHIP
CLE
3.65ERA
3.84FIP
10.53K/9
3.93BB/9
1.27WHIP
Betting Edges
RUN_LINE AWAY +1.5
-48.9% EV
-233
TOTAL UNDER 6.5
-24.6% EV
-122
RUN_LINE HOME -1.5
+18.7% EV
+188
F5_ML AWAY
-18.6% EV
+100
ML AWAY
-17.5% EV
+110
TOTAL OVER 6.5
+17.1% EV
+100
First 5 Innings & NRFI
BOS F5
1.8 runs
32.1% win
CLE F5
2.6 runs
51.4% win
F5 Total
4.4
NRFI
55.6%
YRFI
44.4%
Avg 1st Inn Runs
0.90
HR Spotlight
Avg HRs
1.8
Over 0.5 HR
83%
Over 1.5 HR
54%
No HR
17%
Angel Martínez CLE21.4%
ISO: 0.125 | Barrel: 12.5% | vs Sonny Gray | Park: 0.97x Platoon: 1.12x
Chase DeLauter CLE18.7%
ISO: 0.195 | Barrel: 9.0% | vs Sonny Gray | Park: 0.97x Platoon: 1.12x
Travis Bazzana CLE17.1%
ISO: 0.148 | Barrel: 7.1% | vs Sonny Gray | Park: 0.97x Platoon: 1.12x
Pitcher Strikeout Projections
Sonny Gray
0.0 K projected
BOS | K/9: 0.0
Parker Messick
0.0 K projected
CLE | K/9: 0.0
Injury Report
BOS8 injured
Garrett Whitlock RP15-DAY-IL
Roman Anthony LF10-DAY-IL
Triston Casas 1B60-DAY-IL
Patrick Sandoval SP60-DAY-IL
Garrett Crochet SP15-DAY-IL
Romy Gonzalez 1B60-DAY-IL
+2 more
CLE4 injured
Gabriel Arias SS60-DAY-IL
Steven Kwan CFBEREAVEMENT
Erik Sabrowski RP15-DAY-IL
Carlos Hernandez RPDAY-TO-DAY
AI Intelligence Analysis
LEAN +1YELLOW ZONE50.7% WR (n=6)
Parker Messick (9.8 K/9, B- grade) significantly outpitches Sonny Gray (7.0 K/9, B- grade) — a 2.8 K/9 gap is MASSIVE in starting pitching. Model shows 60.7% CLE vs 56.3% market. Home field + pitcher mismatch + cold weather all favor CLE. This is a PITCHER_MISMATCH flag.
Key Factors
- Starting pitchers: Parker Messick (CLE, B-, 9.8 K/9, strong command) vs Sonny Gray (BOS, B-, 7.0 K/9). MESSICK IS CLEARLY SUPERIOR: +2.8 K/9 differential (26 K differential over 200 IP). This is an ELITE pitcher matchup.
- Messick grades B- overall (0.523 score), Gray grades B- (0.451 score). Messick has better stuff and more K's. This is a PITCHER_MISMATCH to CLE.
- CLE also has home field advantage (park factor 1.0, neutral, but historical home field = +2-3% inherently).
- Market has CLE at -129 (56.3%) vs model 60.7%. 4.4% edge to CLE home. Combo zone (61.6% WR home ML, n=80) supports play.
- Over edge 17.1% (disabled), but game should be low-scoring: both SPs are quality (B- grade), cold weather (63.8°F, wind 6.6mph out).
Risk Factors
- BOS is 5 games under .500 (27-32), CLE is 33-26. CLE is better team, but BOS has decent bats (Rafael Devers, Jarren Duran). Edge isn't as large as pitcher gap suggests.
- Cold weather (63.8°F) suppresses runs — both teams' offenses less potent.
- Confidence modifier is +1 (LEAN), not +2 (BET), due to: (1) small sample zone profile (n=6), (2) over edge disabled.
Edge Analysis
Moneyline
CLE 62.2%
+18.7 pts
Run Line
-1.5
+18.7 pts
Total
6.5
+17.1 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 →