Updated 2026-07-23 21:41 UTC
MLB · Thursday, July 23 — 9:16 PM ET

ArizonaatSt. Louis

Busch Stadium · MLB.TV · Arizona Diamondbacks (53-49) at St. Louis Cardinals (52-49)
Arizona 19%
81% St. Louis

Odds Board — Best Price Highlighted

Book Arizona ML St. Louis ML Spread (St. Louis) Total
FanDuel+320-460-2.5 (-108)8.5
DraftKings+291-401-2.5 (+101)8.5
BetMGM+290-400-2.5 (+105)8.5

Cells in amber are the best available price on that side. Shopping the difference between books is worth 1–2% in long-run ROI — more than most handicapping.

The Rundown

Arizona heads to Busch Stadium to face St. Louis on July 23, with the Cardinals installed as heavy -420 moneyline favorites — that'll cost you $4.20 to win a dollar on St. Louis. The run line sits at -2.5 for the home side, and that number has moved a full run in St. Louis's favor since open, shifting from -1.5 to -2.5, which is meaningful line movement worth noting. Arizona is getting +300 on the money line as modest 53-49 visitors against a Cardinals team sitting nearly identical at 52-49, so the records alone don't justify this spread. The total is posted at 8.5, suggesting oddsmakers anticipate a moderately active offensive game at Busch Stadium. The sharp money moving St. Louis from -1.5 to -2.5 is the loudest signal here — the market clearly trusts the Cardinals at home and isn't done yet.

Where the Money Is

Spread has moved 1 toward St. Louis Cardinals since open (-1.5 → -2.5)

Derived from our hourly line history. Book-reported betting percentages coming soon.

The Simulation — 10,000 Runs

We simulated this matchup 10,000 times using market-implied scoring parameters.

76%
St. Louis win the game
50%
game goes Over
50%
game stays Under

The middle 80% of simulations land between Arizona by 2 and St. Louis by 7 — this one's live to swing either way.

Predictions & Best Bets — The Picks Desk

DESK CONSENSUS · 2/3 on St. Louis (spread)DESK CONSENSUS · 2/3 on Under (total)DESK CONSENSUS · 3/3 on St. Louis (moneyline)
MoneylineSpreadTotal
CH
Chalk
AI · The Market Reader
St. Louis -420
Consensus prices St. Louis at 76% to win. I count the votes; the votes say St. Louis.
Arizona +2.5
Books charge more juice on Arizona's side of the number — that's where the market is leaning.
Over 8.5
The over is the expensive side at 8.5 — juice tells you which way the room is betting.
IR
Iris
AI · The Price Hunter
St. Louis -400
Best board has St. Louis -400 vs a -420 consensus — 20 cents of free value. I take the mispricing.
St. Louis -2.5 (+105)
No number-shopping edge here, so I take the cheaper juice — St. Louis at +105 is the better-priced side of the same line.
Under 8.5 (+100)
Same number everywhere, so I take the cheaper side of it — the under at +100 costs less to be right.
ST
Steamer
AI · The Line Follower
St. Louis -420
St. Louis's price has shortened 294 cents since open. Steam is steam.
St. Louis -2.5
Spread has walked 1 toward St. Louis since open. Lines move because money moves them — I follow.
Under 8.5
The over is taking the money and the total hasn't budged — a number that won't move is a number the book likes. I take the under.

Three AI models, three reasoning styles, nine independent calls. Meet the picks desk →