MLB matchup analysis

Tigers vs White Sox Prediction, Odds and Model Pick

Thursday, September 17, 2026 at Rate Field · 7:40 PM ET

Pass

LyDia decision: Pass on Tigers vs White Sox

Lab Rating
4.4/10
Model lean
Tigers 52.0%
Market probability
48.6%
Model edge
+3.4%
Best moneyline
+101
Sportsbooks checked
8
LyDia model
52.0%
Market
48.6%

The case for Detroit Tigers

Late-inning bullpen advantage
Chicago White Sox relievers have a 4.11 ERA over the last 7 days; Detroit Tigers relievers have a 3.28. If this is still close after six innings, that gap favors Detroit Tigers.
Bats are hot: +0.022 wOBA
Detroit Tigers 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 Chicago White Sox

The case is thin
The model finds little going Chicago White Sox's way — it trails on the pitching plan, bullpen, and recent form. The main path to a Chicago White Sox win is variance.

Why it is not official

Below the 61.0% official gate
Win probability is 52.0%. 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 4.4/10, under the 7.2/10 required for an official pick.
Own bullpen carries risk: 6.5/10
The Detroit Tigers 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 Detroit Tigers (52.0%) is close enough to a coin flip that the rating credits little or no conviction -- credit only starts above 55%.
Pitching plan: 14.67/40
Framber Valdez rates 61 on LyDia's pitcher score, judged on its own merits (50-80 is the credited range). Average or below by that measure, so it earns little or none of the available credit here -- independent of who the opponent is throwing.
Offense: 29.19/50
Detroit Tigers's recent offensive form clearly outpaces Chicago White Sox's over the tracked windows.

Why the price is what it is

Team strength: 58.5%
Before any pitcher or bullpen adjustment, LyDia's team-strength model alone makes Detroit Tigers 58.5% to win. Everything below moves the price from this starting point.
Pitcher score gap: 0 points
The two starters grade essentially even on pitcher score -- this term does little to move the price either way.
Bullpen adjustment: +0.09
The bullpen-fatigue gap between the two pens nudges the price toward Detroit Tigers. This moves the price less than the starting pitchers do, since a starter covers more of the game than the bullpen.
Net effect: 58.5% -> 52.0%
Team strength alone had Detroit Tigers at 58.5%. After the pitcher and bullpen terms, the price is 52.0% -- 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

MatchupDetroit Tigers at Chicago White Sox
DateThursday, September 17, 2026
First pitch7:40 PM ET
VenueRate Field
Starting pitchersFramber Valdez vs Erick Fedde
WeatherGame-time forecast: 68°F, 7% precipitation chance, 8 mph wind from N.

Starting pitcher matchup

Full Pitcher Matchup Tool →
Framber ValdezTigers · LHP
vs
Erick FeddeWhite Sox · RHP
MetricTigersWhite Sox
Pitching planTraditional starterTraditional starter
Expected innings5⅔5
ThrowsLR
LyDia pitcher score (higher is better)6161
ERA (lower is better)4.013.97
WHIP (lower is better)1.361.34
K/9 (higher is better)6.76.1
K-BB% (higher is better)8.6%7.5%
K% (higher is better)17.0%15.9%
BB% (lower is better)8.4%8.4%
BB/9 (lower is better)3.33.2
HR/9 (lower is better)0.81.5
Ground-ball rate61.7%43.8%
Fly-ball rate38.3%56.2%

Pitcher edge: LyDia gives Erick Fedde a 0-point edge over Framber Valdez, driven mainly by WHIP (1.34 vs 1.36) and BB/9 (3.2 vs 3.3).

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

Strikeout Projections Full strikeout projections →

Framber Valdez strikeouts
4.4 LyDia projected Ks
No K play · -0.1K difference is below LyDia's 0.7K threshold
Market 4.5K · O -104 / U -110 · 5 books
Erick Fedde strikeouts
4.0 LyDia projected Ks
No K play · +0.5K difference is below LyDia's 0.7K threshold
Market 3.5K · O +124 / U -135 · 5 books

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

Tigers are 7-3 in their last 10 and averaging 6.0 runs per game over the last 15 days; White Sox are 3-7 in their last 10 and averaging 3.6 runs per game over the last 15 days. Season run differential separates them by almost nothing (+0.50 against +0.22).

MetricTigersWhite Sox
Last 107-33-7
Last 10 by venue (away team on the road, home team at home)4-6 on the road5-5 at home
OPS, last 15 days0.7690.665
wOBA, last 15 days (hot/cold read)0.3380.300
Runs per game, last 15 days6.03.6
K% last 15 days (lower is better)23.8%27.8%

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 daysTigersWhite Sox
OPS0.655 (-0.061 vs szn)0.690 (-0.032 vs szn)
Runs per game4.07 (-0.419 vs szn)4.00 (-0.678 vs szn)
wOBA (model offense input)0.292 (-0.024 vs szn)0.310 (-0.009 vs szn)
K% (lower is better)24.1% (+1.3% vs szn)25.1% (+0.9% vs szn)

Over the last 30 days the White Sox have been the better offense, 0.310 wOBA to 0.292. They are cooling off against their own season line (-0.009 wOBA). White Sox are striking out at 25.1% over the window — something the opposing starter can lean on.

Season profile

Full Stats page →
MetricTigersWhite Sox
Record72-8077-75
Run differential / game (team quality)+0.50+0.22
Runs scored / game (offense, season)4.494.68
Runs allowed / game (defense, season, lower better)3.994.45
Season OPS0.7160.722
K% season (lower is better)22.8%24.2%
OPS vs opposing hand (season)0.7250.743

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. Tigers and White Sox are highlighted.

Tigers
Combined risk
6.5 Tired
Fatigue
7.0 Tired
Efficiency
6.0 Effective
White Sox
Combined risk
9.5 High risk
Fatigue
9.5 High risk
Efficiency
5.0 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.

MetricTigersWhite Sox
Fatigue7.0/10, Tired9.5/10, High risk
Efficiency6.0/10, Effective5.0/10, Average
Combined risk6.5/10, Tired9.5/10, High risk
Relief innings, last 7 days24.746.0
Back-to-back arms62
7-day ERA3.284.11
7-day WHIP1.011.30

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
6.1
Market total
8.5
Projected away runs
3.5
Projected home runs
1.8
Over price
-105
Under price
-109
Detroit Tigers team total
3.5 projected
Line 3.5 · O -143 / U +118
No team-total lean
Chicago White Sox team total
1.8 projected
Line 4.5 · O +117 / U -145
Under research lean (-2.7)

The model projects 2.4 runs below 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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