Arizona Diamondbacks at Kansas City Royals
All Arizona Diamondbacks predictions · All Kansas City Royals predictions
MLB · Tuesday, September 8, 2026 · 7:40 PM · Final: 5-3
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 | Arizona Diamondbacks | Kansas City Royals |
|---|---|---|
| BetMGM | -105 | -115 |
| BetRivers | -109 | -105 |
| DraftKings | -103 | -117 |
| ESPN BET | -104 | -108 |
| Fanatics | -105 | -115 |
| FanDuel | -108 | -108 |
| Hard Rock Bet | -110 | -110 |
| Caesars | +101 | -111 |
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 | Diamondbacks | Royals |
|---|---|---|
| BetMGM | −1.5 +150 | +1.5 -185 |
| BetRivers | −1.5 +145 | +1.5 -177 |
| DraftKings | −1.5 +152 | +1.5 -184 |
| ESPN BET | −1.5 +150 | +1.5 -180 |
| Fanatics | −1.5 +150 | +1.5 -185 |
| FanDuel | −1.5 +146 | +1.5 -178 |
| Hard Rock Bet | −1.5 +150 | +1.5 -180 |
| Caesars | −1.5 +150 | +1.5 -178 |
| Total by book | Over | Under |
|---|---|---|
| BetMGM | 9 -110 | 9 -110 |
| BetRivers | 9 -118 | 9 -103 |
| DraftKings | 9 -110 | 9 -110 |
| ESPN BET | 9.5 +115 | 9.5 -135 |
| Fanatics | 9 -110 | 9 -110 |
| FanDuel | 8.5 -118 | 8.5 -104 |
| Hard Rock Bet | 8.5 -140 | 8.5 +105 |
| Caesars | 9 -105 | 9 -115 |
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 | Arizona Diamondbacks | Kansas City Royals |
|---|---|---|
| Books consensus fair, de-vigged | 49.2% | 50.8% |
| Best book price incl. vig | 49.8% | 51.2% |
| Kalshi contract price | 49.0% | 51.0% |
| Polymarket contract price | 49.5% | 50.5% |
| Markets average | 49.2% | 50.8% |
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.