Sports Edge Model — every game called, every call graded, in public

Chicago Cubs at Kansas City Royals

All Chicago Cubs predictions · All Kansas City Royals predictions

MLB · Saturday, August 8, 2026 · 7:10 PM · Final: 3-6

The model's call
Chicago Cubs to win
Model confidence 59.0%
Books consensus 59.0%
Result Kansas City Royals won model ✗
Identical on purpose: the model applies no adjustment to the de-vigged consensus of the books and Novig, a no-cut exchange, until a candidate signal proves itself in shadow audit — none has yet. Kalshi and Polymarket below are a comparison, not an input.

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 Chicago CubsKansas City Royals
BetMGM -165 +135
BetRivers -165 +143
DraftKings -148 +138
ESPN BET -155 +135
Fanatics -155 +130
FanDuel -150 +140
Hard Rock Bet -150 +140
Caesars -153 +143

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 · closing
Cubs −1.5
priced 48.0% to cover · 8 books
Kansas City Royals covered +1.5
Total · closing
O/U 9
priced 51.1% over · 5 books, 3 on another number
opened 9.5
Push at 9
Spread by book CubsRoyals
BetMGM −1.5 -102 +1.5 -118
BetRivers −1.5 -104 +1.5 -118
DraftKings −1.5 -102 +1.5 -118
ESPN BET −1.5 -105 +1.5 -115
Fanatics −1.5 +100 +1.5 -120
FanDuel −1.5 +100 +1.5 -120
Hard Rock Bet −1.5 +105 +1.5 -115
Caesars −1.5 +100 +1.5 -120
Total by bookOverUnder
BetMGM 9 -115 9 -105
BetRivers 9 -112 9 -108
DraftKings 9 -115 9 -105
ESPN BET 9.5 +110 9.5 -130
Fanatics 9 -115 9 -105
FanDuel 9.5 -102 9.5 -120
Hard Rock Bet 9.5 +110 9.5 -120
Caesars 9 -110 9 -110

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 Chicago CubsKansas City Royals
Books consensus fair, de-vigged 59.0% 41.0%
Best book price incl. vig 59.7% 41.2%
Kalshi contract price 59.5% 40.5%
Polymarket contract price 58.5% 41.5%
Markets average 59.0% 41.0%

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.

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