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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
6
BOS 36%64% CHC
Prediction Confidence:
Moderate

Chicago Cubs 64% to win. The top 2 signals favoring Cubs:

  • Offensive Efficiency. Cubs offense (5.2 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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VenueTropicana Field
St. Petersburg, Florida

Team Comparison

Head-to-head snapshot based on our model inputs

Cubs (away)
Red Sox (home)
64%
Win probability
36%
2
High-impact factors
0
11
Players ruled out
13

Post-Game Analysis

How our model performed

The Cubs defeated the Red Sox 6-2.

Our model predicted the Cubs would win with 64% confidence -- and they delivered. Even with modest confidence, the model got this one right.

Looking at the factors our model weighed:

  • Offensive Efficiency favored the Cubs and was a major factor: Cubs offense (5.2 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.

Cubs won 2-6

Cubs won by a solid margin

Prediction CorrectWe predicted Cubs at 64%

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
  • ELO RatingNeutral
  • Recent FormNeutral
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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
ELO Rating
Recent Form
Favours CHC|Favours BOS

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Understanding the win probability calculation

Offensive Efficiency

Cubs offense (5.2 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 (87-74) vs Cubs (88-73)

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: 9/27/2026, 7:00:04 PM

Red Sox

Triston Casas1B(Wrist)
OUT
Anthony Seigler2B(Wrist)
OUT
Curtis Mead3B(Wrist)
OUT
Eli WhiteCF(Foot)
OUT
Mickey GasperDH(Biceps)
OUT
Masataka YoshidaDH(Hamstring)
OUT
Zack KellyRP(Elbow)
OUT
Tyron GuerreroRP(Shoulder)
OUT
Justin SlatenRP(Elbow)
OUT
Eduardo RiveraSP(Back)
OUT
Kutter CrawfordSP(Forearm)
OUT
Johan OviedoSP(Elbow)
OUT
Garrett CrochetSP(Lat)
OUT

Cubs

Tyler Austin1B(Knee)
OUT
Hunter HarveyRP(Triceps)
OUT
Porter HodgeRP(Elbow)
OUT
Shelby MillerRP(Elbow)
OUT
Trent ThorntonRP(Ankle)
OUT
Ben BrownRP(Neck)
OUT
Phil MatonRP(Knee)
OUT
Riley MartinRP(Elbow)
OUT
Edward CabreraSP(Personal)
OUT
Justin SteeleSP(Elbow)
OUT
Cade HortonSP(Elbow)
OUT
Kevin GausmanSP(Shoulder)
QUESTIONABLE

Key Players

Cubs

David PetersonSP
Kevin GausmanSPQUESTIONABLE
Aaron CivaleSP
Edward CabreraSPOUT
-1.1% win prob impact
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 36% win probability, while Cubs has a 64% 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 Tropicana Field in St. Petersburg, Florida.

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