Pittsburgh Pirates @ Chicago Cubs
PPAwayPittsburgh Pirates38%
@CCHomeChicago Cubs62%
Model PickChicago Cubs 62%Market edge — disclosed after closing odds are collectedEvidence 12 structured · 4 qualitative
AI Summary grounded in real data · zero hallucination
Our model projects the Chicago Cubs with a 62% win probability against the Pittsburgh Pirates, leading us to pick the Cubs. This pick is primarily driven by the Cubs' advantages in 'Starting Pitcher Matchup' and 'Pythagorean Expectation'. However, the Pirates' superior 'Last 10 Games Form' presents a key swing risk. The market edge for this pick is currently uncalculated.
Logistic-regression statistical model — predicts Pittsburgh Pirates vs Chicago Cubs by accumulating the log-odds contributions of 12 proven structured metrics. Only structured metrics enter the probability; qualitative and folklore factors get a label only. Predictions are sealed with SHA-256 before the game.
Model factor contribution How the 62% home win was derived
Home Advantage+2.5
Pythagorean Expectation+2.8
Season Win%+0.9
Last 10 Games Form-3.7
Home/Away Split+1.3
Team OBP+1.5
Team SLG+2.1
Team ERA-0.2
Team WHIP+0.7
Starting Pitcher Matchup+3.6
Baseline 50% → final home win61.5%
Each factor's log-odds contribution accumulated · only structured metrics reflected (qualitative/folklore excluded) · each %p converts log-odds to probability, so it's non-linear — a simple sum may not exactly equal (final − baseline)
Structured metric analysis 12 metrics · fully disclosed
| Metric | Analysis (home vs away) | Source |
|---|---|---|
| Home Advantage | Chicago Cubs at home — MLB historical home win rate ~.535 (ballpark familiarity, no travel) | MLB StatsAPI |
| Pythagorean Expectation | Home 58.7% (792 RS/654 RA) vs Away 51.7% (711/685) — strength from runs scored/allowed | MLB StatsAPI |
| Season Win% | Home 82-66 (.554) vs Away 74-74 (.500) | MLB StatsAPI |
| Last 10 Games Form | Home 4-6 vs Away 7-3 · Home W1 | MLB StatsAPI |
| Home/Away Split | Home team home 42-31 · away team away 36-40 | MLB StatsAPI |
| Team OBP | Home .340 vs Away .330 — foundation of scoring | MLB StatsAPI |
| Team SLG | Home .431 vs Away .402 (OPS .771/.732) | MLB StatsAPI |
| Team ERA | Home 4.20 vs Away 4.18 — lower is better | MLB StatsAPI |
| Team WHIP | Home 1.27 vs Away 1.30 — baserunners allowed per inning (lower is better) | MLB StatsAPI |
| Starting Pitcher Matchup | Home Clay Holmes (ERA 2.83) vs Away Paul Skenes (ERA 3.83) | MLB StatsAPI |
| Hitting Detail (BABIP, K, BB) | Home BABIP .293 · K 1245 · BB 622 / Away BABIP .313 · K 1380 · BB 523 (BABIP is luck-driven → not factored into probability) | MLB StatsAPI |
| Pitching Detail (K/BB, HR9) | Home K/BB 2.54 · HR9 1.51 / Away K/BB 2.54 · HR9 0.97 | MLB StatsAPI |
Qualitative & folklore factors 4 factors · fully disclosed
Qualitative · Cubs Snap Skid
The Cubs decisively ended their four-game losing streak with a 12-2 rout of the Pirates in their last outing. This dominant win could significantly boost team morale and momentum heading into the next game.
Basis: LLM · news · Cubs pound the Pirates 12-2 to end their 4-game sk
Qualitative · Rookie Starter Debut
The Pirates might be starting a pitcher making his first career start in this game. While opposing hitters may lack prior scouting, the rookie could also struggle with nerves or pressure facing MLB lineups for the first time.
Basis: LLM · news · Facing a First-Time Starter
Qualitative · Cubs' Offensive Outburst
The Cubs' offense exploded for 12 runs against the Pirates in their previous game. This suggests their hitters are in a groove and could carry that offensive momentum into the next contest.
Basis: LLM · news · Cubs pound the Pirates 12-2
Qualitative · Bregman's Power Surge
Cubs' Alex Bregman hit his 25th home run in the last game, indicating he's in strong hitting form. His continued power surge could be a significant boost to the team's offense.
Basis: LLM · news · Alex Bregman hits his 25th homer
12 source headlines (auto-collected · basis disclosed)
- Pittsburgh Pirates at Chicago Cubs Game Story, Scores/Highlights - 09/11/2026
- Pittsburgh Pirates vs. Chicago Cubs: Game Highlights
- How to watch Pirates vs. Cubs: TV channel and streaming options for September 11
- On The Horizon: Cubs vs. Pirates series preview
- Pittsburgh Pirates at Chicago Cubs - Where to Watch, Stream Info, TV Channel, and Live Updates (September 11, 2026)
- Cubs vs. Pirates Lineup: A Get-Right Game? Facing a First-Time Starter, More
- Pirates vs Cubs Prediction, Picks & Odds for Today's MLB Game
- Photos: Chicago Cubs 12, Pittsburgh Pirates 2
Frequently asked questions This game's prediction summary
Pittsburgh Pirates vs Chicago Cubs — who's more likely to win?
SealedSlate's logistic-regression statistical model gives Chicago Cubs a 62% chance to win (Home 62% · Away 38%). MLB · 2026-09-13 03:20 KST.
How was the 61.5% home-win probability calculated?
Starting from a 50% baseline, we additively accumulate the log-odds contributions of 12 proven structured statistical metrics to reach the final 61.5%. Each factor's %p contribution is fully disclosed on the page; qualitative and folklore factors are not reflected in the probability.
Can this prediction be altered later?
No. Every prediction is sealed with a SHA-256 hash before the game starts and permanently recorded in the track record, making after-the-fact changes impossible. SealedSlate runs a transparent ledger that never inflates the hit rate and leaves missed predictions exactly as they were.
We don't compete on hit rate — every factor is fully disclosed and labeled. Only 📊 structured stats feed the probability (each factor's contribution shown in %p); ⚔️🔮 are context to weigh. Predictions are locked and sealed before the game — verify the hits directly on the track record.