Houston Astros at Seattle Mariners
All Houston Astros predictions · All Seattle Mariners predictions
MLB · Tuesday, September 22, 2026 · 9:41 PM · Final: 7-0
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 | Houston Astros | Seattle Mariners |
|---|---|---|
| BetMGM | +110 | -135 |
| BetRivers | +112 | -134 |
| DraftKings | +109 | -132 |
| ESPN BET | +120 | -140 |
| Fanatics | +110 | -130 |
| FanDuel | +116 | -134 |
| Hard Rock Bet | +115 | -140 |
| Caesars | +115 | -136 |
Spread & total
Not part of the model's call. Collected from every book and graded in public so the prices can be checked — how spreads and totals have graded so far. The percent is what the price itself implies, vig removed.
| Spread by book | Astros | Mariners |
|---|---|---|
| BetMGM | +1.5 -190 | −1.5 +155 |
| BetRivers | +1.5 -195 | −1.5 +160 |
| DraftKings | +1.5 -198 | −1.5 +163 |
| ESPN BET | +1.5 -180 | −1.5 +150 |
| Fanatics | +1.5 -190 | −1.5 +155 |
| FanDuel | +1.5 -192 | −1.5 +158 |
| Hard Rock Bet | +1.5 -190 | −1.5 +155 |
| Caesars | +1.5 -195 | −1.5 +160 |
| Total by book | Over | Under |
|---|---|---|
| BetMGM | 7.5 +105 | 7.5 -125 |
| BetRivers | 7 -134 | 7 -107 |
| DraftKings | 7 -117 | 7 -103 |
| ESPN BET | 7.5 +105 | 7.5 -125 |
| Fanatics | 7 -115 | 7 -105 |
| FanDuel | 7.5 +104 | 7.5 -128 |
| Hard Rock Bet | 7.5 +105 | 7.5 -125 |
| Caesars | 7.5 +110 | 7.5 -135 |
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 | Houston Astros | Seattle Mariners |
|---|---|---|
| Books consensus fair, de-vigged | 44.9% | 55.1% |
| Best book price incl. vig | 45.5% | 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.