Arizona Diamondbacks at St. Louis Cardinals Prediction — July 23, 2026

THE PICK

ARI Arizona DiamondbacksAWAY · 1505 ELO

St. Louis CardinalsHOME · 1508 ELO STL

46.0% WIN PROBABILITY 54.0%

The model makes St. Louis Cardinals a 54.0% favorite — home advantage included. One game is one game: a 54.0% edge still loses 46.0 times in 100.

Prediction history

1 UPDATE

Every time the model moved this pick — logged in full. It updates until 15 minutes before gametime, then locks.

OPEN

54.0% St. Louis Cardinals OPENING LINE

First model run when the matchup posted. Elo gap of 3 points at open.

The factors

CONTEXT ONLY

Everything the model sees for this game. Only backtest-validated signals move the probability — the rest is context, shown anyway.

GAME-TIME CONDITIONS · DAY GAME

74°F DEW 56°F HUM 52% WIND 8 MPH CLOUD 100% 1002 hPa

SCHEDULE & TRAVEL

ARI REST 0D STL REST 0D ARI TRAVELED 1270 MI ARI CROSSED 1 TIME ZONE

The numbers

AWAY

Arizona Diamondbacks

ELO RATING1505

RANK#15

RECORD49-47

LAST 106-4

STREAKW4

HOME

St. Louis Cardinals

ELO RATING1508

RANK#13

RECORD50-45

LAST 104-6

STREAKL1

Ratings come from every MLB result this season — updated daily, weighted by margin of victory, with St. Louis Cardinals getting the standard home bump. An Elo difference of 3 points plus home advantage at Busch Stadium produces the 54.0% call. Full methodology →

What could break the pick

Arizona Diamondbacks come in hot on a 4-game win streak — recent form the season-long rating hasn't fully priced in. This is a coin-flip game — the model calls it a lean, not a lock. Starting pitchers, lineup cards, and bullpen usage move real outcomes in ways a rating system can’t see.