MLB matchup analysis

White Sox vs Cubs Prediction, Odds and Model Pick

Monday, August 17, 2026 at Wrigley Field · 8:05 PM ET

Value Watch

LyDia prediction: Chicago Cubs moneyline

Lab Rating
7.5/10
Model lean
Cubs 74.1%
Market probability
60.2%
Model edge
+13.9%
Best moneyline
-162
Sportsbooks checked
9
LyDia model
74.1%
Market
60.2%

The case for Chicago Cubs

Starting pitcher edge: 18 points
LyDia gives Shota Imanaga a 18-point edge over Luis Castillo, driven mainly by WHIP (1.10 vs 1.35) and BB/9 (1.9 vs 2.8).
Late-inning bullpen advantage
Chicago White Sox relievers have a 4.88 ERA over the last 7 days; Chicago Cubs relievers have a 3.91. Chicago White Sox also have 8 arms pitching on back-to-back days, against 5 for Chicago Cubs. If this is still close after six innings, that gap favors Chicago Cubs.

The case for Chicago White Sox

Their bats are hot: +0.026 wOBA
Chicago White Sox is outhitting its own season form over the last 15 days.

Why it is not official

Setup quality below the bar
Lab Rating is 7.5/10, under the 8.0/10 required for an official pick.
Own bullpen carries risk: 7.3/10
The Chicago Cubs bullpen comes in tired. A lead after six innings is less safe than usual.
Opponent is swinging it
The other lineup is +0.026 wOBA above its season form over the last 15 days.
The verdict Real value, not an official bet. The +13.9% edge on Chicago Cubs is genuine, but setup quality below the bar. If you play it, you are taking on risk LyDia's official card will not.
Read the full model output

Chicago Cubs is a value watch, not an official pick. LyDia projects 74.1% against a 60.2% no-vig market number, a 13.9% model edge at -162. Lab Rating 7.5/10: conviction 20, pitching plan 18, bullpen 13.82, offense 23.28. Chicago Cubs's pen efficiency: Average (5.4/10). It stayed a value watch because Lab Rating is 7.5/10, below the 8.0/10 official-pick gate. Lineup check: Chicago Cubs is a touch above its season form (+0.023 OPS); Chicago White Sox is swinging a hot bat (+0.064 OPS).

Game information

MatchupChicago White Sox at Chicago Cubs
DateMonday, August 17, 2026
First pitch8:05 PM ET
VenueWrigley Field
Starting pitchersLuis Castillo vs Shota Imanaga
WeatherGame-time forecast: 72°F, 0% precipitation chance, 3 mph wind from SE.

Starting pitcher matchup

Full Pitcher Matchup Tool →
Luis CastilloWhite Sox · RHP
vs
Shota ImanagaCubs · LHP
MetricWhite SoxCubs
Pitching planTraditional starterTraditional starter
Expected innings5⅓5⅔
ThrowsRL
LyDia pitcher score (higher is better)5775
ERA (lower is better)4.963.74
WHIP (lower is better)1.351.10
K/9 (higher is better)8.28.5
K-BB% (higher is better)13.6%18.2%
K% (higher is better)20.9%23.5%
BB% (lower is better)7.2%5.2%
BB/9 (lower is better)2.81.9
HR/9 (lower is better)1.41.8
Ground-ball rate44.3%40.5%
Fly-ball rate55.7%59.5%

Pitcher edge: LyDia gives Shota Imanaga a 18-point edge over Luis Castillo, driven mainly by WHIP (1.10 vs 1.35) and BB/9 (1.9 vs 2.8).

How to read this: the scorecards above name the starters; every number lives in this table. Highlighted cells mark a gap big enough to matter. K% and BB% are strikeout and walk rate as a share of batters faced -- K-BB% is the two combined into one skill number. HR/9 is home runs allowed per nine innings. Ground-ball and fly-ball rate are neither good nor bad on their own: high ground-ball pitchers trade strikeouts for double plays and fewer home runs, and on this data source the two rates are complementary (they add to 100%), not independent reads.

Strikeout Projections Full strikeout projections →

Luis Castillo strikeouts
4.9 LyDia projected Ks
No K play · +0.4K difference is below LyDia's 0.7K threshold
Market 4.5K · O -104 / U -113 · 3 books
Shota Imanaga strikeouts
5.5 LyDia projected Ks
No K play · 0.0K difference is below LyDia's 0.7K threshold
Market 5.5K · O -128 / U +103 · 3 books

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. White Sox are 6-4 in their last 10, averaging 5.5 runs per game over the last 15 days, and swinging above their season form; Cubs are 6-4 in their last 10 and averaging 5.4 runs per game over the last 15 days. On the season Cubs carry the better run differential per game (+0.80 against +0.38).

MetricWhite SoxCubs
Last 106-46-4
Last 10 by venue (away team on the road, home team at home)6-4 on the road6-4 at home
OPS, last 15 days0.7940.777
wOBA, last 15 days (hot/cold read)0.3480.340
Runs per game, last 15 days5.55.4
K% last 15 days (lower is better)25.0%22.6%

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 daysWhite SoxCubs
OPS0.720 (-0.010 vs szn)0.788 (+0.034 vs szn)
Runs per game4.74 (-0.089 vs szn)5.68 (+0.519 vs szn)
wOBA (model offense input)0.3180.345 (+0.012 vs szn)
K% (lower is better)24.7% (+0.8% vs szn)23.2% (+1.4% vs szn)

Over the last 30 days the Cubs have been the better offense, 0.345 wOBA to 0.318. They are running hot against their own season line (+0.012 wOBA). White Sox are striking out at 24.7% over the window — something the opposing starter can lean on.

Season profile

Full Stats page →
MetricWhite SoxCubs
Record65-5872-53
Run differential / game (team quality)+0.38+0.80
Runs scored / game (offense, season)4.835.16
Runs allowed / game (defense, season, lower better)4.454.36
Season OPS0.7300.754
K% season (lower is better)23.9%21.8%
OPS vs opposing hand (season)0.7340.738

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. White Sox and Cubs are highlighted.

White Sox
Combined risk
9.4 High risk
Fatigue
9.3 High risk
Efficiency
4.8 Average
Cubs
Combined risk
7.3 Tired
Fatigue
7.5 Tired
Efficiency
5.4 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.

MetricWhite SoxCubs
Fatigue9.3/10, High risk7.5/10, Tired
Efficiency4.8/10, Average5.4/10, Average
Combined risk9.4/10, High risk7.3/10, Tired
Relief innings, last 7 days31.323.0
Back-to-back arms85
7-day ERA4.883.91
7-day WHIP1.181.13

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
11.2
Market total
8.0
Projected away runs
5.2
Projected home runs
5.7
Over price
-113
Under price
-102
Chicago White Sox team total
5.2 projected
Line 3.5 · O -113 / U -113
Over research lean (+1.7)
Chicago Cubs team total
5.7 projected
Line 4.5 · O +102 / U -130
Over research lean (+1.2)

The model projects 3.2 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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