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
Calibrated accuracy at this confidence: 61.6% (2,610 games)
Projected Runs Range 10th – 90th percentile
BOS
246
CLE
346
Projected
CLE 4.5 — BOS 3.6
Actual
CLE 1 — BOS 9
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 +1
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. Probabilities are calibrated using Bayesian methods and sized via the Kelly Criterion. Full methodology →
Permanent record: this game page is retired 90 days after the event. The full graded MLB 2026 record — every pick, win rate, units and ROI — lives on the MLB 2026 season report card.