Seattle Mariners @ Colorado Rockies
SMAwaySeattle Mariners73%
@CRHomeColorado Rockies27%
Model PickSeattle Mariners 73%Market edge — disclosed after closing odds are collectedEvidence 12 structured · 4 qualitative
AI Summary grounded in real data · zero hallucination
We project a Seattle Mariners victory with a 73% probability, though the edge against the market is uncalculated. The primary drivers supporting Seattle are Team SLG and Team OBP, while the most significant swing risk stems from negative differentials in Team ERA and Team WHIP. We transparently acknowledge that our model does not beat the market over the long term, advising a cautious betting approach.
Logistic-regression statistical model — predicts Seattle Mariners vs Colorado Rockies 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 27% home win was derived
Home Advantage+2.5
Pythagorean Expectation-2.5
Season Win%-1.8
Last 10 Games Form-5
Home/Away Split+0
Team OBP+1.8
Team SLG+2.8
Team ERA-11.9
Team WHIP-6
Starting Pitcher Matchup-3.3
Baseline 50% → final home win26.7%
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 | Colorado Rockies at home — MLB historical home win rate ~.535 (ballpark familiarity, no travel) | MLB StatsAPI |
| Pythagorean Expectation | Home 40.0% (721 RS/899 RA) vs Away 46.2% (629/684) — strength from runs scored/allowed | MLB StatsAPI |
| Season Win% | Home 56-98 (.364) vs Away 72-82 (.468) | MLB StatsAPI |
| Last 10 Games Form | Home 1-9 vs Away 5-5 · Home L3 | MLB StatsAPI |
| Home/Away Split | Home team home 31-45 · away team away 32-47 | MLB StatsAPI |
| Team OBP | Home .324 vs Away .312 — foundation of scoring | MLB StatsAPI |
| Team SLG | Home .418 vs Away .381 (OPS .742/.693) | MLB StatsAPI |
| Team ERA | Home 5.61 vs Away 4.21 — lower is better | MLB StatsAPI |
| Team WHIP | Home 1.53 vs Away 1.26 — baserunners allowed per inning (lower is better) | MLB StatsAPI |
| Starting Pitcher Matchup | Home Jose Quintana (ERA 5.27) vs Away Bryce Miller (ERA 4.19) | MLB StatsAPI |
| Hitting Detail (BABIP, K, BB) | Home BABIP .308 · K 1339 · BB 483 / Away BABIP .278 · K 1338 · BB 521 (BABIP is luck-driven → not factored into probability) | MLB StatsAPI |
| Pitching Detail (K/BB, HR9) | Home K/BB 2.06 · HR9 1.42 / Away K/BB 3.20 · HR9 1.23 | MLB StatsAPI |
Qualitative & folklore factors 4 factors · fully disclosed
Qualitative · Rockies' Home Skid
The Colorado Rockies are highly motivated to snap their current home losing streak, which could significantly boost team morale and performance in this game.
Basis: LLM · news · Rockies host Seattle Mariners, look to stop home l
Qualitative · Mariners' Young Guns Shine
Seattle's young players delivered strong performances in the previous game, contributing to a Mariners' victory. This momentum could boost overall team confidence and drive.
Basis: LLM · news · MARINERS POSTCAST: The Seattle Mariners YOUNG GUNS
Qualitative · Rockies' Missed Chances
Despite creating numerous scoring opportunities in their last game, the Colorado Rockies failed to capitalize and lost. This could motivate them to focus more on converting chances in the upcoming match.
Basis: LLM · news · Rockies create plenty of chances, but Mariners esc
Qualitative · Mariners' Close Win
The Seattle Mariners secured a tight 5-4 victory against the Colorado Rockies in their last outing, indicating the team's ability to win even in close, challenging situations.
Basis: LLM · news · Seattle Mariners defeat Colorado Rockies, 5-4
12 source headlines (auto-collected · basis disclosed)
- Seattle Mariners at Colorado Rockies Game Story, Scores/Highlights - 09/18/2026
- How to watch Mariners vs. Rockies: TV channel and streaming options for September 18
- Photos: Seattle Mariners take on Colorado Rockies
- Seattle Mariners at Colorado Rockies - Where to Watch, Stream Info, TV Channel, and Live Updates (September 19, 2026)
- Highs and Lows: Mariners at Rockies Series Preview
- Colorado Rockies vs. Seattle Mariners: Game preview, picks and props for Friday
- Photos: Seattle Mariners defeat Colorado Rockies, 5-4
- Rockies create plenty of chances, but Mariners escape with 5-4 win
Frequently asked questions This game's prediction summary
Seattle Mariners vs Colorado Rockies — who's more likely to win?
SealedSlate's logistic-regression statistical model gives Seattle Mariners a 73% chance to win (Home 27% · Away 73%). MLB · 2026-09-20 09:10 KST.
How was the 26.7% 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 26.7%. 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.