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, indicating a clear advantage over the Pittsburgh Pirates (38%). The Cubs benefit significantly from 'Home Advantage' and 'Pythagorean Expectation', though their 'Last 10 Games Form' presents a potential swing factor. 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%+1
Last 10 Games Form-1.2
Home/Away Split+1.4
Team OBP+1.5
Team SLG+2.2
Team ERA-0.1
Team WHIP+0.7
Starting Pitcher Matchup+0.8
Baseline 50% → final home win61.6%
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% (796 RS/657 RA) vs Away 51.6% (714/689) — strength from runs scored/allowed | MLB StatsAPI |
| Season Win% | Home 83-66 (.557) vs Away 74-75 (.497) | MLB StatsAPI |
| Last 10 Games Form | Home 5-5 vs Away 6-4 · Home W2 | MLB StatsAPI |
| Home/Away Split | Home team home 43-31 · away team away 36-41 | MLB StatsAPI |
| Team OBP | Home .340 vs Away .330 — foundation of scoring | MLB StatsAPI |
| Team SLG | Home .431 vs Away .401 (OPS .771/.731) | MLB StatsAPI |
| Team ERA | Home 4.19 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 Matthew Boyd (ERA 4.03) vs Away Bubba Chandler (ERA 4.25) | MLB StatsAPI |
| Hitting Detail (BABIP, K, BB) | Home BABIP .292 · K 1251 · BB 625 / Away BABIP .312 · K 1388 · BB 528 (BABIP is luck-driven → not factored into probability) | MLB StatsAPI |
| Pitching Detail (K/BB, HR9) | Home K/BB 2.53 · HR9 1.51 / Away K/BB 2.54 · HR9 0.97 | MLB StatsAPI |
Qualitative & folklore factors 4 factors · fully disclosed
Qualitative · Pirates Rookie Debut
The Pittsburgh Pirates are set to start a first-time pitcher against the Chicago Cubs, which could introduce an element of unpredictability for the team.
Basis: LLM · news · Facing a First-Time Starter
Qualitative · Cubs' Batting Surge
The Chicago Cubs' offense is red-hot, having exploded for 12 runs on 16 hits in their previous game.
Basis: LLM · news · Cubs 12, Pirates 2: Alex Bregman’s three hits and
Qualitative · Cubs' 'Get-Right' Game
The Chicago Cubs view facing a first-time starter as a 'get-right' game, an opportunity to turn their momentum around and potentially string together wins.
Basis: LLM · news · A Get-Right Game? Facing a First-Time Starter
Qualitative · Frequent Hit Batters
The previous game saw multiple hit batsmen between the two teams, which could lead to heightened tension or retaliatory plays in the upcoming match.
Basis: LLM · news · The hit batsmen just kept on coming
12 source headlines (auto-collected · basis disclosed)
- Pittsburgh Pirates at Chicago Cubs Game Story, Scores/Highlights - 09/12/2026
- Cubs 4, Pirates 3: The hit batsmen just kept on coming
- Pittsburgh Pirates vs. Chicago Cubs: Game Highlights
- How to watch Pirates vs. Cubs: TV channel and streaming options for September 12
- Pittsburgh Pirates vs. Chicago Cubs: Paul Skenes vs. Clay Holmes
- Pittsburgh Pirates at Chicago Cubs Game Story, Scores/Highlights - 09/11/2026
- 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
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 · 2026-09-14 03:20 KST.
How was the 61.6% 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 61.6%. 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.