Pittsburgh Pirates @ Chicago Cubs
PPAwayPittsburgh Pirates43%
@CCHomeChicago Cubs57%
Model PickChicago Cubs 57%Market edge — disclosed after closing odds are collectedEvidence 12 structured · 2 qualitative
AI Summary grounded in real data · zero hallucination
We recommend backing the Chicago Cubs, who hold a 57% win probability for this matchup. The primary drivers supporting this pick are 'Home Advantage' and 'Pythagorean Expectation', while the most critical swing risk stems from their negative 'Last 10 Games Form'. With the edge against the market uncalculated, this selection should be approached with caution, keeping in mind that our model does not beat the market over the long run.
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 57% home win was derived
Home Advantage+2.5
Pythagorean Expectation+2.3
Season Win%+0.8
Last 10 Games Form-5
Home/Away Split+1.1
Team OBP+1.2
Team SLG+1.9
Team ERA-0.8
Team WHIP+0.7
Starting Pitcher Matchup+1.8
Baseline 50% → final home win56.7%
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 58.1% (780 RS/652 RA) vs Away 52.4% (709/673) — strength from runs scored/allowed | MLB StatsAPI |
| Season Win% | Home 81-66 (.551) vs Away 74-73 (.503) | MLB StatsAPI |
| Last 10 Games Form | Home 4-6 vs Away 8-2 · Home L4 | MLB StatsAPI |
| Home/Away Split | Home team home 41-31 · away team away 36-39 | MLB StatsAPI |
| Team OBP | Home .339 vs Away .331 — foundation of scoring | MLB StatsAPI |
| Team SLG | Home .429 vs Away .403 (OPS .768/.734) | MLB StatsAPI |
| Team ERA | Home 4.22 vs Away 4.13 — 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 Shota Imanaga (ERA 3.91) vs Away Wilber Dotel (ERA 4.41) | MLB StatsAPI |
| Hitting Detail (BABIP, K, BB) | Home BABIP .292 · K 1243 · BB 620 / Away BABIP .314 · K 1376 · BB 520 (BABIP is luck-driven → not factored into probability) | MLB StatsAPI |
| Pitching Detail (K/BB, HR9) | Home K/BB 2.54 · HR9 1.52 / Away K/BB 2.55 · HR9 0.97 | MLB StatsAPI |
Qualitative & folklore factors 2 factors · fully disclosed
Qualitative · Wild Card Race
The Pittsburgh Pirates are getting closer in the NL Wild Card race, which significantly boosts their motivation for this game.
Basis: LLM · news · Pirates Getting Closer in NL Wild Card Race
Qualitative · Teams' Divergent Trajectories
The Pirates and Cubs are currently headed in opposite directions, which could impact team morale and momentum going into the series.
Basis: LLM · news · Pirates, Cubs headed in opposite directions ahead
12 source headlines (auto-collected · basis disclosed)
- Pittsburgh Pirates at Chicago Cubs Preview - 09/11/2026
- Pittsburgh Pirates at Chicago Cubs - Where to Watch, Stream Info, TV Channel, and Live Updates (September 11, 2026)
- Pirates vs. Cubs (Sep 11, 2026) Pregame
- Pirates vs. Cubs (12 Sep, 2026) Live Score
- Pittsburgh Pirates vs. Chicago Cubs - Live Score - September 11, 2026
- Pirates Reveal Starting Pitchers Against White Sox
- Pirates, Cubs headed in opposite directions ahead of 3-game set
- Chicago Cubs vs. Pittsburgh Pirates - September 11, 2026
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 57% chance to win (Home 57% · Away 43%). MLB · 2026-09-12 03:20 KST.
How was the 56.7% 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 56.7%. 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.