MLB matchup analysis

Cubs vs Brewers Prediction, Odds and Model Pick

Monday, September 7, 2026 at American Family Field · 2:10 PM ET

Pass

LyDia decision: Pass on Cubs vs Brewers

Lab Rating
5.8/10
Model lean
Cubs 51.9%
Market probability
34.4%
Model edge
+17.4%
Best moneyline
+184
Sportsbooks checked
6
LyDia model
51.9%
Market
34.4%

The case for Chicago Cubs

Late-inning bullpen advantage
Milwaukee Brewers relievers have a 5.34 ERA over the last 7 days; Chicago Cubs relievers have a 5.76. If this is still close after six innings, that gap favors Chicago Cubs.
Bats are hot: +0.043 wOBA
Chicago Cubs is outhitting its own season form over the last 15 days. Recent form is context, not a model input, but it points the same way here.

The case for Milwaukee Brewers

Their bats are hot: +0.020 wOBA
Milwaukee Brewers is outhitting its own season form over the last 15 days.
Team strength favors Milwaukee Brewers
Before any pitcher or bullpen adjustment, LyDia's own team-strength model has Milwaukee Brewers ahead (59.4% to 57.0%). The pick still comes from Chicago Cubs once the pitcher and bullpen terms are applied.

Why it is not official

Below the 61.0% official gate
Win probability is 51.9%. LyDia does not make a game official below 61.0%, no matter how good the price is. This is a value spot, not a high-confidence winner.
Setup quality below the bar
Lab Rating is 5.8/10, under the 7.2/10 required for an official pick.
Own bullpen carries risk: 6.8/10
The Chicago Cubs bullpen comes in tired. A lead after six innings is less safe than usual.

Why the setup score is what it is

Conviction: 0/10
LyDia's own win probability for Chicago Cubs (51.9%) is close enough to a coin flip that the rating credits little or no conviction -- credit only starts above 55%.
Pitching plan: 20/40
Matthew Boyd rates 66 on LyDia's pitcher score, judged on its own merits (50-80 is the credited range). That is a strong start on its own, and it earns most or all of the available credit here.
Offense: 38.38/50
Chicago Cubs's recent offensive form clearly outpaces Milwaukee Brewers's over the tracked windows.

Why the price is what it is

Team strength: 57.0%
Before any pitcher or bullpen adjustment, LyDia's team-strength model alone makes Chicago Cubs 57.0% to win. Everything below moves the price from this starting point.
Pitcher score gap: 3 points
The pitcher-score gap favors Chicago Cubs by 3 points. This is the biggest single mover of the price -- a large gap moves it a lot, a small gap barely moves it.
Bullpen adjustment: +0.078
The bullpen-fatigue gap between the two pens nudges the price toward Chicago Cubs. This moves the price less than the starting pitchers do, since a starter covers more of the game than the bullpen.
Net effect: 57.0% -> 51.9%
Team strength alone had Chicago Cubs at 57.0%. After the pitcher and bullpen terms, the price is 51.9% -- the same number shown as Model Lean above.
The verdict LyDia passes. The combined Lab Rating did not clear the official threshold.
Read the full model output

The combined Lab Rating did not clear the official threshold.

Game information

MatchupChicago Cubs at Milwaukee Brewers
DateMonday, September 7, 2026
First pitch2:10 PM ET
VenueAmerican Family Field
Starting pitchersMatthew Boyd vs Robert Gasser
WeatherGame-time forecast: 78°F, 0% precipitation chance, 10 mph wind from SE. This venue has a roof, but the roof status is not confirmed.

Starting pitcher matchup

Full Pitcher Matchup Tool →
Matthew BoydCubs · LHP
vs
Robert GasserBrewers · LHP
MetricCubsBrewers
Pitching planTraditional starterTraditional starter
Expected innings5⅔5
ThrowsLL
LyDia pitcher score (higher is better)6662
ERA (lower is better)3.904.43
WHIP (lower is better)1.211.28
K/9 (higher is better)7.18.6
K-BB% (higher is better)11.9%14.6%
K% (higher is better)19.1%21.9%
BB% (lower is better)7.2%7.3%
BB/9 (lower is better)2.72.9
HR/9 (lower is better)1.21.4
Ground-ball rate49.5%38.0%
Fly-ball rate50.5%62.0%

Pitcher edge: LyDia gives Matthew Boyd a 4-point edge over Robert Gasser, driven mainly by expected innings (5.7 vs 5.1) and ERA (3.90 vs 4.43).

How to read this: the scorecards above name the starters; every number lives in this table.

Strikeout Projections Full strikeout projections →

Matthew Boyd strikeouts
4.2 LyDia projected Ks
No K play · -0.3K difference is below LyDia's 0.7K threshold
Market 4.5K · O +100 / U -135 · 1 book
Robert Gasser strikeouts
3.3 LyDia projected Ks
No strikeout line posted when this page was generated

Same data source as the Pitcher Matchup Tool, where every starter on the slate is compared side by side.

Both sides arrive in similar form. Cubs are 5-5 in their last 10 and averaging 6.9 runs per game over the last 15 days; Brewers are 5-5 in their last 10 and averaging 5.2 runs per game over the last 15 days. Season run differential separates them by almost nothing (+0.92 against +1.17).

MetricCubsBrewers
Last 105-55-5
Last 10 by venue (away team on the road, home team at home)4-6 on the road7-3 at home
OPS, last 15 days0.8820.784
wOBA, last 15 days (hot/cold read)0.3820.347
Runs per game, last 15 days6.95.2
K% last 15 days (lower is better)16.8%21.0%

Last 15 days only. Hot and cold streaks for all 30 teams live on the Stats page.

30-day offense

Full offense tool →
Last 30 daysCubsBrewers
OPS0.842 (+0.071 vs szn)0.752 (+0.014 vs szn)
Runs per game6.04 (+0.725 vs szn)5.17 (+0.159 vs szn)
wOBA (model offense input)0.365 (+0.026 vs szn)0.333 (+0.007 vs szn)
K% (lower is better)19.8% (-1.6% vs szn)22.8% (+1.3% vs szn)

Over the last 30 days the Cubs have been the better offense, 0.365 wOBA to 0.333. They are running hot against their own season line (+0.026 wOBA).

Season profile

Full Stats page →
MetricCubsBrewers
Record81-6388-56
Run differential / game (team quality)+0.92+1.17
Runs scored / game (offense, season)5.335.04
Runs allowed / game (defense, season, lower better)4.423.88
Season OPS0.7700.738
K% season (lower is better)21.4%21.6%
OPS vs opposing hand (season)0.8100.701

Season-long team quality, not recent form. Run differential and run environment come from the season standings; splits for all 30 teams live on the Stats page, including the run environment table.

Every team on today's slate, on any two axes you pick. Cubs and Brewers are highlighted.

Cubs
Combined risk
6.8 Tired
Fatigue
6.1 Normal
Efficiency
3.7 Below average
Brewers
Combined risk
9.4 High risk
Fatigue
8.8 High risk
Efficiency
3.8 Below average

Risk is what the model actually uses: fatigue blended with how well the pen has pitched. High fatigue with high efficiency is a tired pen that is still getting outs.

MetricCubsBrewers
Fatigue6.1/10, Normal8.8/10, High risk
Efficiency3.7/10, Below average3.8/10, Below average
Combined risk6.8/10, Tired9.4/10, High risk
Relief innings, last 7 days25.028.7
Back-to-back arms56
7-day ERA5.765.34
7-day WHIP1.521.64

Fatigue measures workload. Efficiency measures recent run prevention. Combined risk is what the moneyline and totals systems use.

Run total projection

Full Totals Projections →
LyDia projection
12.4
Market total
7.5
Projected away runs
7.0
Projected home runs
4.9
Over price
+107
Under price
-108
Chicago Cubs team total
7.0 projected
Line Not available · O Not available / U Not available
Market line pending
Milwaukee Brewers team total
4.9 projected
Line Not available · O Not available / U Not available
Market line pending

The model projects 4.9 runs above the market total. A research lean still requires a setup rating of at least 7.0/10. Team totals remain research-only until their graded sample is established.

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