San Francisco Giants at Boston Red Sox
All San Francisco Giants predictions · All Boston Red Sox predictions
MLB · Sunday, August 23, 2026 · 3:16 PM · Final: 4-5
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 | San Francisco Giants | Boston Red Sox |
|---|---|---|
| BetMGM | +180 | -220 |
| BetRivers | +170 | -195 |
| DraftKings | +191 | -206 |
| ESPN BET | +186 | -212 |
| Fanatics | +175 | -215 |
| FanDuel | +186 | -205 |
| Hard Rock Bet | +190 | -200 |
| Caesars | +185 | -205 |
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 | San Francisco Giants | Boston Red Sox |
|---|---|---|
| Books consensus fair, de-vigged | 34.2% | 65.8% |
| Best book price incl. vig | 34.4% | 66.1% |
| Kalshi contract price | 34.5% | 65.5% |
| Polymarket contract price | 34.5% | 65.5% |
| Markets average | 34.5% | 65.5% |
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.