MLB Slate — 2026-09-21

Predictions for every game on 2026-09-21 (ET)

Matchup (home in bold)SP (away vs. home)SP adj (Elo, away/home)PickWin probExp. runs (winner first)Exp. total
Blue Jays @ OriolesTrey Yesavage vs. Shane Baz+8.5 / +1.9Orioles51%4.5–4.48.6
Nationals @ TigersDJ Herz vs. River Ryan-3.4 / -0.8Tigers58%4.8–4.29.1
Twins @ GiantsZebby Matthews vs. Blade Tidwell-11.1 / -7.2Giants54%4.7–4.59.2

Starter identity IS a model input: each probable's rolling game score (exponentially weighted, 20-start half-life) is compared to his team's staff average and the difference enters the team's Elo at 3.0 points per game-score point (the SP adj column, so the effect is auditable per game). Rookies/thin history fall back to a shrunk staff rating; TBD uses the staff rating. Rest and travel add up to a few Elo points each. Win probability from Elo (+24 home advantage). Expected total is matchup-specific: each club's recent runs scored/allowed (exponentially weighted, ~20-game half-life, shrunk to league average) sets the run environment, and the Elo-implied margin is carved out of it. Expected runs are shown at one decimal; read them as averages, not a literal final score.

Betting-blind Elo model (K=3, +24 home, MOV-weighted, 60% season carryover) · Can Tre Beat Vegas · whosyurgoat.app/vegas/mlb

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