Washington Nationals at Detroit Tigers
All Washington Nationals predictions · All Detroit Tigers predictions
MLB · Monday, September 21, 2026 · 6:41 PM
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 | Washington Nationals | Detroit Tigers |
|---|---|---|
| BetMGM | +115 | -135 |
| BetRivers | +115 | -137 |
| DraftKings | +112 | -135 |
| ESPN BET | +115 | -135 |
| Fanatics | +110 | -130 |
| FanDuel | +110 | -130 |
| Hard Rock Bet | +115 | -135 |
| Caesars | +112 | -130 |
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 | Washington Nationals | Detroit Tigers |
|---|---|---|
| Books consensus fair, de-vigged | 44.9% | 55.1% |
| Best book price incl. vig | 46.5% | 56.5% |
| Kalshi contract price | 44.5% | 55.5% |
| Polymarket contract price | 44.5% | 55.5% |
| Markets average | 44.5% | 55.5% |
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.