MLB matchup analysis
Pirates vs Cubs Prediction, Odds and Model Pick
Saturday, September 12, 2026 at Wrigley Field · 2:20 PM ET
LyDia prediction: Chicago Cubs moneyline
The case for Chicago Cubs
The case for Pittsburgh Pirates
Why it is not official
Why the setup score is what it is
Why the price is what it is
Read the full model output
Chicago Cubs is a value watch, not an official pick. LyDia projects 57.0% against a 53.8% no-vig market number, a 3.2% model edge at -123. Lab Rating 7.8/10: conviction 0.99, pitching plan 30.67, offense 46.54. Chicago Cubs's pen efficiency: Effective (5.7/10). It stayed a value watch because model win probability is 57.0%, below the 61.0% official-pick gate. Lineup check: Chicago Cubs is swinging a hot bat (+0.105 OPS); Pittsburgh Pirates is near its season form (-0.009 OPS). Recent form supports this side and is included in the unified run projection.
Final result
Pirates 3, Cubs 4
How the analysis held up
Chicago Cubs won, the side LyDia's model favored.
Paul Skenes (No clear pitching-plan edge), the starter LyDia's pitcher score favored, actually outpitched Clay Holmes: 7.0 IP, 2 ER (2.57 ERA) against 5.2 IP, 2 ER (3.18 ERA). The edge held up.
The Pittsburgh Pirates bullpen was flagged as elevated risk pregame (High risk). In relief it actually allowed 2 earned runs over 1.0 innings (18.00 ERA) — the risk read showed up.
The Chicago Cubs bullpen was not flagged pregame, but it had a night worth noting: 0 earned runs allowed over 3.1 relief innings (0.00 ERA) — quietly better than the pregame read implied. Note: 1 of the runs charged to the Chicago Cubs pitching staff overall was unearned — not something the bullpen's stuff should be blamed for.
Game information
| Matchup | Pittsburgh Pirates at Chicago Cubs |
|---|---|
| Date | Saturday, September 12, 2026 |
| First pitch | 2:20 PM ET |
| Venue | Wrigley Field |
| Starting pitchers | Paul Skenes vs Clay Holmes |
| Weather | Game-time forecast: 82°F, 4% precipitation chance, 4 mph wind from W. |
Starting pitcher matchup
Full Pitcher Matchup Tool →| Metric | Pirates | Cubs |
|---|---|---|
| Pitching plan | Traditional starter | Traditional starter |
| Expected innings | 5⅓ | 5⅔ |
| Throws | R | R |
| LyDia pitcher score (higher is better) | 71 | 73 |
| ERA (lower is better) | 3.78 | 2.85 |
| WHIP (lower is better) | 1.13 | 1.15 |
| K/9 (higher is better) | 10.3 | 7.0 |
| K-BB% (higher is better) | 20.9% | 9.8% |
| K% (higher is better) | 27.8% | 18.9% |
| BB% (lower is better) | 6.9% | 9.0% |
| BB/9 (lower is better) | 2.6 | 3.3 |
| HR/9 (lower is better) | 0.9 | 0.6 |
| Ground-ball rate | 44.9% | 65.0% |
| Fly-ball rate | 55.1% | 35.0% |
Pitcher edge: LyDia gives Clay Holmes a 2-point edge over Paul Skenes, driven mainly by ERA (2.85 vs 3.78) and HR/9 (0.59 vs 0.94).
How to read this: the scorecards above name the starters; every number lives in this table.
Strikeout Projections Full strikeout projections →
Same data source as the Pitcher Matchup Tool, where every starter on the slate is compared side by side.
Recent form
Full Stats page →Pirates are 7-3 in their last 10 and averaging 4.2 runs per game over the last 15 days; Cubs are 4-6 in their last 10 and averaging 6.9 runs per game over the last 15 days. On the season Cubs carry the better run differential per game (+0.93 against +0.17).
| Metric | Pirates | Cubs |
|---|---|---|
| Last 10 | 7-3 | 4-6 |
| Last 10 by venue (away team on the road, home team at home) | 6-4 on the road | 5-5 at home |
| OPS, last 15 days | 0.723 | 0.876 |
| wOBA, last 15 days (hot/cold read) | 0.323 | 0.380 |
| Runs per game, last 15 days | 4.2 | 6.9 |
| K% last 15 days (lower is better) | 20.6% | 17.4% |
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 days | Pirates | Cubs |
|---|---|---|
| OPS | 0.685 (-0.046 vs szn) | 0.815 (+0.044 vs szn) |
| Runs per game | 4.07 (-0.718 vs szn) | 5.79 (+0.443 vs szn) |
| wOBA (model offense input) | 0.306 (-0.018 vs szn) | 0.355 (+0.015 vs szn) |
| K% (lower is better) | 23.3% (-0.8% vs szn) | 19.4% (-1.9% vs szn) |
Over the last 30 days the Cubs have been the better offense, 0.355 wOBA to 0.306. They are running hot against their own season line (+0.015 wOBA).
Season profile
Full Stats page →| Metric | Pirates | Cubs |
|---|---|---|
| Record | 74-74 | 82-66 |
| Run differential / game (team quality) | +0.17 | +0.93 |
| Runs scored / game (offense, season) | 4.79 | 5.34 |
| Runs allowed / game (defense, season, lower better) | 4.62 | 4.41 |
| Season OPS | 0.732 | 0.771 |
| K% season (lower is better) | 24.0% | 21.3% |
| OPS vs opposing hand (season) | 0.754 | 0.758 |
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.
The Map
Full interactive map →Every team on today's slate, on any two axes you pick. Pirates and Cubs are highlighted.
Bullpen matchup
Full Bullpen Fatigue Index →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.
| Metric | Pirates | Cubs |
|---|---|---|
| Fatigue | 9.5/10, High risk | 6.1/10, Normal |
| Efficiency | 4.2/10, Below average | 5.7/10, Effective |
| Combined risk | 9.9/10, High risk | 5.8/10, Normal |
| Relief innings, last 7 days | 29.7 | 21.0 |
| Back-to-back arms | 7 | 5 |
| 7-day ERA | 5.46 | 3.00 |
| 7-day WHIP | 1.35 | 1.33 |
Fatigue measures workload. Efficiency measures recent run prevention. Combined risk is what the moneyline and totals systems use.
Run total projection
Full Totals Projections →The current model and market total cannot be compared yet. Team totals remain research-only until their graded sample is established.
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