Houston Astros @ Seattle Mariners
HAAwayHouston Astros37%
@SMHomeSeattle Mariners63%
Model PickSeattle Mariners 63%Market edge — disclosed after closing odds are collectedEvidence 12 structured · 3 qualitative
AI Summary grounded in real data · zero hallucination
We project a Seattle Mariners victory with a 63% probability, driven primarily by their advantages in 'Starting Pitcher Matchup' and 'Team ERA'. However, their deficit in 'Team SLG' remains the primary swing risk for this matchup, with the edge against the market currently uncalculated. While acknowledging that our model does not beat the market over the long term, this prediction leans heavily on Seattle's pitching superiority.
Logistic-regression statistical model — predicts Houston Astros vs Seattle Mariners 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 63% home win was derived
Home Advantage+2.5
Pythagorean Expectation+0
Season Win%-0.5
Last 10 Games Form+2.5
Home/Away Split+0.3
Team OBP-0.1
Team SLG-2.2
Team ERA+3
Team WHIP+2
Starting Pitcher Matchup+5.8
Baseline 50% → final home win63.2%
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 | Seattle Mariners at home — MLB historical home win rate ~.535 (ballpark familiarity, no travel) | MLB StatsAPI |
| Pythagorean Expectation | Home 46.1% (634 RS/690 RA) vs Away 46.2% (688/747) — strength from runs scored/allowed | MLB StatsAPI |
| Season Win% | Home 73-83 (.468) vs Away 77-79 (.494) | MLB StatsAPI |
| Last 10 Games Form | Home 5-5 vs Away 3-7 · Home W1 | MLB StatsAPI |
| Home/Away Split | Home team home 40-35 · away team away 38-37 | MLB StatsAPI |
| Team OBP | Home .312 vs Away .313 — foundation of scoring | MLB StatsAPI |
| Team SLG | Home .380 vs Away .410 (OPS .692/.723) | MLB StatsAPI |
| Team ERA | Home 4.19 vs Away 4.53 — lower is better | MLB StatsAPI |
| Team WHIP | Home 1.26 vs Away 1.34 — baserunners allowed per inning (lower is better) | MLB StatsAPI |
| Starting Pitcher Matchup | Home Logan Gilbert (ERA 3.69) vs Away Cristian Javier (ERA 5.31) | MLB StatsAPI |
| Hitting Detail (BABIP, K, BB) | Home BABIP .277 · K 1352 · BB 526 / Away BABIP .277 · K 1282 · BB 502 (BABIP is luck-driven → not factored into probability) | MLB StatsAPI |
| Pitching Detail (K/BB, HR9) | Home K/BB 3.20 · HR9 1.22 / Away K/BB 2.17 · HR9 1.31 | MLB StatsAPI |
Qualitative & folklore factors 3 factors · fully disclosed
Qualitative · Road Losing Streak
The Houston Astros are currently on a road losing streak, which will fuel their motivation to break it against the Seattle Mariners.
Basis: LLM · news · Astros take road losing streak
Qualitative · Crucial Season Stretch
The Astros are entering a crucial final stretch of the season, which could impact player focus and performance.
Basis: LLM · news · Astros Enter Crucial Final Stretch
Qualitative · Roster Shake-up
The Astros recently released four players, a significant roster shake-up that could affect team morale and lineup construction.
Basis: LLM · news · Astros Announce Release of 4 Players
12 source headlines (auto-collected · basis disclosed)
- Houston Astros at Seattle Mariners Preview - 09/22/2026
- Houston Astros at Seattle Mariners - Where to Watch, Stream Info, TV Channel, and Live Updates (September 22, 2026)
- Astros take road losing streak into matchup with the Mariners
- Houston Astros @ Seattle Mariners: Live game updates, stats, play-by-play
- How to Watch Astros vs. Mariners: Streaming & TV on Sept. 22
- Astros vs. Mariners (23 Sep, 2026) Live Score
- Astros Enter Crucial Final Stretch After Familiar Late-Season Test
- Seattle Mariners vs. Houston Astros Series Sept. 22-23: Odds, Starting Pitchers & Predictions
Frequently asked questions This game's prediction summary
Houston Astros vs Seattle Mariners — who's more likely to win?
SealedSlate's logistic-regression statistical model gives Seattle Mariners a 63% chance to win (Home 63% · Away 37%). MLB · 2026-09-23 10:40 KST.
How was the 63.2% 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 63.2%. 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.