Kansas City Royals @ Pittsburgh Pirates
KCRAwayKansas City Royals31%
@PPHomePittsburgh Pirates69%
Model PickPittsburgh Pirates 69%Market edge — disclosed after closing odds are collectedEvidence 12 structured · 3 qualitative
AI Summary grounded in real data · zero hallucination
We project the Pittsburgh Pirates as the pick with a 69% win probability, though the edge against the market is uncalculated. The primary drivers supporting this prediction are '최근 10경기 폼 / Last 10 Games Form' and '팀 평균자책(ERA) / Team ERA', which favor Pittsburgh. However, the key swing risk lies in the '선발 매치업 / Starting Pitcher Matchup' factor, where Kansas City holds a distinct advantage.
Logistic-regression statistical model — predicts Kansas City Royals vs Pittsburgh Pirates 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 69% home win was derived
Home Advantage+2.5
Pythagorean Expectation+3.3
Season Win%+1.1
Last 10 Games Form+3.6
Home/Away Split+2
Team OBP+2.4
Team SLG+0.4
Team ERA+3.6
Team WHIP+1.9
Starting Pitcher Matchup-1.4
Baseline 50% → final home win69.4%
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 | Pittsburgh Pirates at home — MLB historical home win rate ~.535 (ballpark familiarity, no travel) | MLB StatsAPI |
| Pythagorean Expectation | Home 51.7% (738 RS/711 RA) vs Away 43.5% (648/748) — strength from runs scored/allowed | MLB StatsAPI |
| Season Win% | Home 77-77 (.500) vs Away 67-87 (.435) | MLB StatsAPI |
| Last 10 Games Form | Home 6-4 vs Away 3-7 · Home W2 | MLB StatsAPI |
| Home/Away Split | Home team home 40-36 · away team away 28-51 | MLB StatsAPI |
| Team OBP | Home .331 vs Away .314 — foundation of scoring | MLB StatsAPI |
| Team SLG | Home .404 vs Away .398 (OPS .735/.712) | MLB StatsAPI |
| Team ERA | Home 4.19 vs Away 4.65 — lower is better | MLB StatsAPI |
| Team WHIP | Home 1.30 vs Away 1.39 — baserunners allowed per inning (lower is better) | MLB StatsAPI |
| Starting Pitcher Matchup | Home Bubba Chandler (ERA 4.28) vs Away Noah Cameron (ERA 3.84) | MLB StatsAPI |
| Hitting Detail (BABIP, K, BB) | Home BABIP .315 · K 1436 · BB 544 / Away BABIP .287 · K 1209 · BB 494 (BABIP is luck-driven → not factored into probability) | MLB StatsAPI |
| Pitching Detail (K/BB, HR9) | Home K/BB 2.52 · HR9 0.97 / Away K/BB 2.05 · HR9 1.27 | MLB StatsAPI |
Qualitative & folklore factors 3 factors · fully disclosed
Qualitative · Griffin's Hot Bat
Pittsburgh Pirates' Konnor Griffin had a stellar performance in the last game, collecting 4 hits and leading his team to victory. His hot bat could carry over into this matchup.
Basis: LLM · news · Konnor Griffin has 4 hits
Qualitative · Pirates Back to .500
The Pittsburgh Pirates defeated the Royals in their last outing to get back to a .500 record for the season. This positive momentum could boost team morale and carry into the next game.
Basis: LLM · news · Pirates rally past the Royals to reach .500
Qualitative · Horwitz's Impact
Spencer Horwitz, alongside Konnor Griffin, powered the Pirates to victory in the previous game. His contribution could also positively impact the team's offense.
Basis: LLM · news · Spencer Horwitz, Konnor Griffin power Pirates past
12 source headlines (auto-collected · basis disclosed)
- Kansas City Royals at Pittsburgh Pirates Game Story, Scores/Highlights - 09/18/2026
- Kansas City Royals at Pittsburgh Pirates - Where to Watch, Stream Info, TV Channel, and Live Updates (September 18, 2026)
- How to watch Royals vs. Pirates: TV channel and streaming options for September 18
- Royals vs Pirates Prediction, Pick, MLB Odds for Friday, September 18
- Royals vs. Pirates (19 Sep, 2026) Live Score
- Konnor Griffin has 4 hits as the Pirates rally past the Royals to reach .500
- Griffin leads Pirates against the Royals following 4-hit performance
- Royals vs. Pirates (18 Sep, 2026) Live Score
Frequently asked questions This game's prediction summary
Kansas City Royals vs Pittsburgh Pirates — who's more likely to win?
SealedSlate's logistic-regression statistical model gives Pittsburgh Pirates a 69% chance to win (Home 69% · Away 31%). MLB · 2026-09-20 07:40 KST.
How was the 69.4% 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 69.4%. 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.