St. Louis Cardinals at Arizona Diamondbacks

MLB · Sunday, July 19, 2026 · 4:11 PM

The model's call

Arizona Diamondbacks to win

Model confidence 52.2%

Books consensus 52.2%

Identical on purpose: the model applies no adjustment to the books’ de-vigged consensus until a candidate signal proves itself in shadow audit — none has yet. Prediction markets below are a comparison, not an input.

Line shop — latest moneyline by book

Best available price on each side is highlighted. Prices move; always confirm at the book.

Book	St. Louis Cardinals	Arizona Diamondbacks
BetMGM	+100	-120
BetRivers	+100	-120
DraftKings	+100	-120
Fanatics	+100	-120
FanDuel	-102	-116
Hard Rock Bet	+100	-120
Caesars	+100	-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 right now.

Venue	St. Louis Cardinals	Arizona Diamondbacks
Books consensus fair, de-vigged	47.8%	52.2%
Best book price incl. vig	50.0%	53.7%
Kalshi contract price	45.5%	53.5%
Polymarket contract price	46.5%	53.5%
Markets average	46.0%	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.

Back to today's board · The full record