Baltimore Orioles at Boston Red Sox
MLB · Tuesday, July 21, 2026 · 7:11 PM
The model's call
Boston Red Sox to win
Model confidence 51.1%
Books consensus 51.1%
Identical on purpose: the model applies no adjustment to the books’ de-vigged
consensus until a candidate signal proves itself in shadow audit — none has yet.
Prediction markets below are a comparison, not an input.
Closing moneyline by book
The last price each book posted before first pitch — the prices this call could actually have been bet at. Best on each side is highlighted. In-game odds are deliberately excluded: once the game starts, the price tracks the score, not the matchup.
| Book | Baltimore Orioles | Boston Red Sox |
|---|---|---|
| BetMGM | -105 | -115 |
| BetRivers | +100 | -114 |
| DraftKings | -107 | -112 |
| ESPN BET | -105 | -115 |
| Fanatics | -105 | -115 |
| FanDuel | -104 | -112 |
| Hard Rock Bet | -105 | -115 |
| Caesars | -105 | -115 |
Prediction markets vs the books
Every venue sells the same thing — a dollar if that side wins — at a different price. Implied cost per venue below; amber = the cheapest way to buy that side at the close.
| Venue | Baltimore Orioles | Boston Red Sox |
|---|---|---|
| Books consensus fair, de-vigged | 48.9% | 51.1% |
| Best book price incl. vig | 50.0% | 52.8% |
| Kalshi contract price | 47.5% | 52.5% |
| Polymarket contract price | 47.5% | 52.5% |
| Markets average | 47.5% | 52.5% |
Contract prices exclude exchange trading fees (Kalshi ~1–2¢ midrange), which narrow small gaps. A venue meaningfully below the books consensus is either a bargain or an early opinion — the graded record decides which.
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