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MLB · Monday, August 31, 2026

Seattle Mariners @ Boston Red Sox

Graded — this page is the complete record.

The lean (0 units — logged, not staked)

Boston Red Sox ML (-158, FanDuel) · confidence 60.6% of 10,000 sims · edge -0.6 pts · 0u

George Kirby (4.02 ERA, 1.33 WHIP) vs Payton Tolle (3.09 ERA, 1.09 WHIP).

Projected 3.5–4.8; sim total 8.3 against a 7.5 line; park factor 1.06.

Market at board time: moneyline +143 / -162 (consensus at board time) · total 7.5.

Circuit-breaker log (7 checks)
  • Rule 2 check passed: market line -158 within the night-game juice cap (-180; night -180, day -170, day = first pitch before 17:00 venue-local).
  • Rule 8 check passed: raw model 61.2% vs de-vigged market 60.0%: 1.1-point divergence within the 12-point cap (blended to 60.6% at MODEL_WEIGHT=0.5).
  • Edge gate: model edge vs offered price is -0.6 pts (minimum 2). No allocation; a good side at a bad price is a bad bet.
  • Rule 4 check passed: both starters carry full-season workloads.
  • Rule 6 flag: away 14-day wOBA 0.270 trails league 0.314 by 0.043 (threshold 0.035). 8% run tax applied to the away run rate.
  • Rules 3/5 (velocity/spin telemetry): manual review required: Statcast feed not wired.
  • Weather (totals paper track ONLY): 77°F at first pitch: run environment x1.028. Applied to the paper totals pick; the staked board ignores weather entirely.

Open vs close

MarketBoard timeClose
Moneyline (away / home)+143 / -162+143 / -162
Total7.57.5 (o-116 / u-106)

The close is the last pre-first-pitch capture. Movement toward a side after we post is the fastest honest read on pick quality — see the CLV column on the ledger.

No stake rode on this game. The lean and its failed gates above are the whole position: passing is a position too.

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