Kansas City Royals at Boston Red Sox
All Kansas City Royals predictions · All Boston Red Sox predictions
MLB · Sunday, September 13, 2026 · 4:56 PM · Final: 1-4
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 | Kansas City Royals | Boston Red Sox |
|---|---|---|
| BetMGM | +165 | -200 |
| BetRivers | +160 | -195 |
| DraftKings | +159 | -194 |
| ESPN BET | +165 | -195 |
| Fanatics | +160 | -195 |
| FanDuel | +166 | -198 |
| Hard Rock Bet | +160 | -195 |
| Caesars | +158 | -190 |
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 | Royals | Red Sox |
|---|---|---|
| BetMGM | +1.5 -135 | −1.5 +110 |
| BetRivers | +1.5 -137 | −1.5 +114 |
| DraftKings | +1.5 -137 | −1.5 +114 |
| ESPN BET | +1.5 -145 | −1.5 +120 |
| Fanatics | +1.5 -140 | −1.5 +115 |
| FanDuel | +1.5 -137 | −1.5 +114 |
| Hard Rock Bet | +1.5 -140 | −1.5 +115 |
| Caesars | +1.5 -130 | −1.5 +110 |
| Total by book | Over | Under |
|---|---|---|
| BetMGM | 7.5 +100 | 7.5 -120 |
| BetRivers | 7 -127 | 7 -112 |
| DraftKings | 7.5 -107 | 7.5 -113 |
| ESPN BET | 7.5 +100 | 7.5 -120 |
| Fanatics | 7.5 +100 | 7.5 -120 |
| FanDuel | 7.5 -104 | 7.5 -118 |
| Hard Rock Bet | 7.5 +100 | 7.5 -120 |
| Caesars | 7.5 +100 | 7.5 -120 |
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 | Kansas City Royals | Boston Red Sox |
|---|---|---|
| Books consensus fair, de-vigged | 36.8% | 63.2% |
| Best book price incl. vig | 37.6% | 65.5% |
| Kalshi contract price | 36.0% | 64.0% |
| Polymarket contract price | 36.0% | 64.0% |
| Markets average | 36.0% | 64.0% |
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.