ATL vs BOS prediction for May 28, 2026: Our Monte Carlo simulation ran 10,000 game iterations and projects BOS 4.6 - ATL 4.2. BOS is favored with a 55.9% win probability. The run line is 1.5 and the total is 6.5. Model projects 8.8 total runs.
BOS
4.6
Projected Score
VS
O/U 6.5
ATL
4.2
Projected Score
Win Probability
BOSATL
+1.5
Run Line (BOS)
6.5
Total Line
10,000
Simulations
Calibrated accuracy at this confidence: 54.0% (2,610 games)
Projected Runs Range 10th – 90th percentile
ATL
246
BOS
357
Projected
BOS 4.6 — ATL 4.2
Actual
BOS 2 — ATL 10
Starting Pitcher Matchup
Chris Sale L
ATL
SL41%79 mph38% whiff
FF39%95 mph20% whiff
CH12%87 mph33% whiff
Payton Tolle L
BOS
FF45%96 mph24% whiff
SI24%95 mph10% whiff
FC16%89 mph19% whiff
Weather Impact
Fenway Park
68°F4 mph wind
HR: 1.031 Total: 1.017
neutral
Bullpen Comparison
ATL
2.45ERA
2.84FIP
9.80K/9
2.57BB/9
0.99WHIP
BOS
3.75ERA
4.22FIP
9.12K/9
3.43BB/9
1.26WHIP
Betting Edges
RUN_LINE HOME +1.5
-28.3% EV
-164
TOTAL UNDER 6.5
-28.1% EV
+100
F5_ML AWAY
-25.4% EV
-143
RUN_LINE AWAY -1.5
-22.1% EV
+136
F5_ML HOME
+20.0% EV
+114
ML AWAY
-19.1% EV
-133
First 5 Innings & NRFI
ATL F5
2.0 runs
33.4% win
BOS F5
2.6 runs
50.4% win
F5 Total
4.6
NRFI
56.9%
YRFI
43.1%
Avg 1st Inn Runs
0.90
HR Spotlight
Avg HRs
1.8
Over 0.5 HR
84%
Over 1.5 HR
54%
No HR
16%
Willson Contreras BOS22.2%
ISO: 0.348 | Barrel: 13.6% | vs Chris Sale | Park: 1.08x Platoon: 1.12x
Matt Olson ATL18.8%
ISO: 0.277 | Barrel: 16.7% | vs Payton Tolle | Park: 1.08x
Austin Riley ATL13.4%
ISO: 0.108 | Barrel: 8.3% | vs Payton Tolle | Park: 1.08x Platoon: 1.12x
Pitcher Strikeout Projections
Chris Sale
0.0 K projected
ATL | K/9: 0.0
Payton Tolle
0.0 K projected
BOS | K/9: 0.0
Injury Report
ATL8 injured
Spencer Schwellenbach SP60-DAY-IL
Drake Baldwin C10-DAY-IL
AJ Smith-Shawver SP60-DAY-IL
Hurston Waldrep SP60-DAY-IL
Kyle Farmer DH10-DAY-IL
Joe Jimenez RP60-DAY-IL
+2 more
BOS8 injured
Garrett Whitlock RP15-DAY-IL
Triston Casas 1B60-DAY-IL
Patrick Sandoval SP60-DAY-IL
Garrett Crochet SP15-DAY-IL
Roman Anthony LF10-DAY-IL
Romy Gonzalez 1B60-DAY-IL
+2 more
AI Intelligence Analysis
LEAN +1
BOS home underdog shows +15.1% edge (53.8% win prob). Pitcher matchup favors BOS: Payton Tolle (9.7 K/9, B grade command) vs Chris Sale (10.4 K/9, B grade stuff). Both aces, favoring under-scoring environment—but market has priced BOS at +114 odds (46.7% implied), giving BOS 7.1% edge on win probability. Home underdog zone shows positive WR (56.6%, n=166). LEAN BOS ML as home dog in favorable zone.
Key Factors
- Pitcher mismatch slightly favors ATL (Sale 10.4 K/9 vs Tolle 9.7 K/9), but both B-grade arms—low-run environment likely
- Home underdog (BOS) at +114 is in profitable historical support: MLB | ml | home (a supportive track record, n=166) vs away ML historically weak
- Fenway park factor 1.017x with neutral wind (2.9mph tail) and 67.7F—no park advantage
- BOS recent form unknown but AL East division game suggests strength
- F5 ML shows 20% edge for BOS home (56.1% prob) — early-inning strength is key signal
Risk Factors
- Both pitchers are aces (B grade); Sale's 10.4 K/9 and B stuff grade vs Tolle's 9.7 K/9 is marginal mismatch
- Market at +114 (46.7% implied) may have already priced in Boston's home field; 7.1% edge is modest, not extreme
- ATL has deeper lineup than BOS (multiple IL guys in Boston)—could favor visitor
HOME UNDERDOG ZONEPITCHER QUALITY MATCHEDZONE PROFILE POSITIVEF5 SUPPORT
Edge Analysis
Moneyline
BOS 55.9%
-28.3 pts
Run Line
+1.5
-28.3 pts
Total
6.5
+16.5 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 →
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.