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Chicago Cubs at Boston Red Sox

MLBregular • 2026-2027 Season
completed
Red Sox logo
Red Sox
Boston
2
vs
Cubs logo
Cubs
Chicago
0
BOS 34%66% CHC
Prediction Confidence:
Moderate

Chicago Cubs 66% to win. The top 2 signals favoring Cubs:

  • Offensive Efficiency. Cubs offense (5.3 R/G) outpaces Red Sox (4.3 R/G)
  • Injuries. Cubs healthier (11 out, 0 doubtful) vs Red Sox (13 out, 0 doubtful)

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VenueFenway Park
Boston, Massachusetts

Team Comparison

Head-to-head snapshot based on our model inputs

Cubs (away)
Red Sox (home)
66%
Win probability
34%
2
High-impact factors
0
0
Players ruled out
0

Post-Game Analysis

How our model performed

The Red Sox defeated the Cubs 2-0.

Our model predicted the Cubs would win with 66% confidence, but the Red Sox pulled off the upset. These outcomes are what keep sports compelling -- and help our model learn.

Looking at the factors our model weighed:

  • Offensive Efficiency favored the Cubs and was a major factor: Cubs offense (5.3 R/G) outpaces Red Sox (4.3 R/G)
  • Injuries favored the Cubs and was a major factor: Cubs healthier (11 out, 0 doubtful) vs Red Sox (13 out, 0 doubtful)
  • Defensive Efficiency favored the Red Sox and was a notable factor: Red Sox pitching/defense (3.8 RA/G) better than Cubs (4.4 RA/G)
  • Both teams are dealing with injuries -- the Red Sox have 13 player(s) ruled out, while the Cubs have 11.

This analysis was generated from our model's pre-game assessment compared against the actual result. Factor accuracy helps improve future predictions.

Red Sox won 2-0

Red Sox won in a close game

Prediction IncorrectWe predicted Cubs at 66%

Key Factors

What's driving the win probability for this game

  • Offensive EfficiencyFavors Chicago Cubs
  • InjuriesFavors Chicago Cubs
  • Defensive EfficiencyFavors Boston Red Sox
  • Home Field AdvantageFavors Boston Red Sox
  • Recent FormNeutral
  • Head to HeadNeutral
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What's Driving This Game

Each factor's contribution to the final win probability

CHC
BOS
Offensive Efficiency
Injuries
Defensive Efficiency
Home Field Advantage
Recent Form
Favours CHC|Favours BOS

Premium feature: factor breakdown

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Understanding the win probability calculation

Offensive Efficiency

Cubs offense (5.3 R/G) outpaces Red Sox (4.3 R/G)

Cubs

Defensive Efficiency

Red Sox pitching/defense (3.8 RA/G) better than Cubs (4.4 RA/G)

Red Sox

Recent Form

Similar form: Red Sox (85-74) vs Cubs (88-71)

Neutral

Injuries

Cubs healthier (11 out, 0 doubtful) vs Red Sox (13 out, 0 doubtful)

Cubs

1 factor not shown (insufficient data)

Model version: 1.1.0 • Calculated: 9/25/2026, 9:15:03 PM

Key Players

Cubs

David PetersonSP
Kevin GausmanSP
Aaron CivaleSP
Edward CabreraSP
Shota ImanagaSP

Red Sox

Brayan BelloSP
Connelly EarlySP
Jake BennettSP
Sonny GraySP
Tanner HouckSP

Learn About Our Analysis

Learn about the factors behind our predictions

Frequently Asked Questions

Red Sox has a 34% win probability, while Cubs has a 66% win probability based on our analysis.

Our model considers weather conditions, offensive and defensive efficiency, rest days, injury impact, and historical performance.

This game is being played at Fenway Park in Boston, Massachusetts.

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