Detroit Tigers at Seattle Mariners
All Detroit Tigers predictions · All Seattle Mariners predictions
MLB · Tuesday, August 4, 2026 · 9:41 PM · Final: 8-0
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 | Detroit Tigers | Seattle Mariners |
|---|---|---|
| BetMGM | +105 | -125 |
| BetRivers | +112 | -127 |
| DraftKings | +108 | -115 |
| ESPN BET | +105 | -125 |
| Fanatics | +105 | -125 |
| FanDuel | +110 | -120 |
| Hard Rock Bet | +110 | -120 |
| Caesars | +108 | -119 |
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 | Detroit Tigers | Seattle Mariners |
|---|---|---|
| Books consensus fair, de-vigged | 46.8% | 53.2% |
| Best book price incl. vig | 47.2% | 53.5% |
| Kalshi contract price | 46.5% | 53.5% |
| Polymarket contract price | 46.5% | 53.5% |
| Markets average | 46.5% | 53.5% |
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.