San Francisco Giants at Boston Red Sox
All San Francisco Giants predictions · All Boston Red Sox predictions
MLB · Saturday, August 22, 2026 · 7:16 PM · Final: 2-3
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 | +170 | -210 |
| BetRivers | +180 | -210 |
| DraftKings | +189 | -204 |
| ESPN BET | +181 | -207 |
| Fanatics | +175 | -215 |
| FanDuel | +186 | -205 |
| Hard Rock Bet | +190 | -200 |
| Caesars | +190 | -210 |
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 | 34.4% | 65.6% |
| Best book price incl. vig | 34.5% | 66.7% |
| Kalshi contract price | 33.5% | 66.5% |
| Polymarket contract price | 33.5% | 66.5% |
| Markets average | 33.5% | 66.5% |
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.