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MLB

Arizona Diamondbacks vs St. Louis Cardinals

Thursday, July 23, 2026

Matchup Analysis

This MLB matchup features Arizona Diamondbacks (53-49 (31-22)) traveling to take on St. Louis Cardinals (52-49 (26-26)) at Busch Stadium, St. Louis, Missouri. On paper, these teams are nearly identical in terms of net scoring margin. Games between evenly matched squads tend to come down to execution and in-game adjustments rather than raw talent gaps.

Scoring could be a challenge for Cardinals (4.4 PPG) against a Diamondbacks defense allowing just 4.5 PPG. The home team will need to find efficient looks to overcome this defensive wall. Diamondbacks averages 4.5 PPG, and the Cardinals defense has been conceding 4.4 PPG. That gap gives the road team a realistic path to putting points on the board. Both teams' offenses closely mirror what the opposing defense allows, suggesting a game that plays close to each team's season averages. The team that gets stops on key possessions will pull ahead.

Playing at home is worth roughly 3.0 points in MLB, giving Cardinals a built-in edge before first pitch. With just a 0.3-run projected margin, this game is about as close as it gets. Small swings in momentum will determine the winner. The 68% confidence interval ranges from Cardinals losing by 0 to losing by 0. This projects as a grind-it-out affair, with both teams averaging around 4 PPG in typical game environments. Low-scoring games compress margins and make covering large spreads harder.

The market and our model are in agreement on this matchup, which means the sharpest value won't come from the spread. Instead, examine the total and moneyline for any slight mispricing worth targeting.

Team Comparison

ARI Diamondbacks
Stat
STL Cardinals
53-49 (31-22)
Record
52-49 (26-26)
4.5
Runs / Game
4.4
4.5
Runs Allowed / Game
4.4

Current Odds

Team Moneyline Spread Total
ARI Arizona Diamondbacks
+102 +1.5 O 8
STL St. Louis Cardinals
-123 -1.5 U 8
Source: DraftKings Updated: Jul 23, 6:35 AM
Opening line: -1.5 / O/U 8

Model Projection

Team Moneyline Spread Total
ARI Arizona Diamondbacks
+113 +0.3 O 8.9
STL St. Louis Cardinals
-113 -0.3 U 8.9
Source: Model Updated: Jul 23, 6:35 AM

Our Picks

Spread
Pass
Model: -0.3 | Edge below threshold
Total
Pass
Model: 8.9 | Edge below threshold

Key Matchup Factors

Key Matchup Factors:

  • Diamondbacks has a +0.0 scoring margin edge
  • Home court advantage adds 0.3 points for Cardinals
  • Expected scoring: Cardinals ~4, Diamondbacks ~4 (total ~9)
  • Run/puck line pass: model margin below blowout gate

Recent Trends

Cardinals Trends:

  • The over is 2-8 in St. Louis Cardinals's games in their last 10 games
  • The over is 13-27 in St. Louis Cardinals's games at home on a back-to-back
  • The over is 2-7 in St. Louis Cardinals's games at home as a favorite
  • The over is 13-27 in St. Louis Cardinals's games on a back-to-back
  • St. Louis Cardinals is 6-2 ATS with 2+ days rest

Diamondbacks Trends:

  • The over is 2-9 in Arizona Diamondbacks's games after a loss vs a winning team
  • Arizona Diamondbacks is 1-5 straight up with 2+ days rest
  • The over is 5-18 in Arizona Diamondbacks's games after a loss
  • Arizona Diamondbacks is 4-9 straight up after a loss vs a winning team
  • The over is 4-10 in Arizona Diamondbacks's games favorite

Head-to-Head:

  • St. Louis Cardinals is 2-4 ATS vs Arizona Diamondbacks
  • St. Louis Cardinals is 2-4 straight up vs Arizona Diamondbacks
  • St. Louis Cardinals is 1-2 ATS at home vs Arizona Diamondbacks

Matchup Edges

Cardinals

Advantages

  • Home field advantage worth 3.0 runs in our model
  • Elite pitching allowing just 4.4 RPG
  • Net scoring margin of -0.0 RPG per game

Disadvantages

  • Limited offense averaging just 4.4 RPG
  • Negative scoring margin of -0.0 RPG per game
  • Model sees 1.2-point edge favoring the away side

Diamondbacks

Advantages

  • Stout pitching allowing just 4.5 RPG
  • Net scoring margin of +0.0 RPG per game
  • Model-projected win probability of 47%

Disadvantages

  • Playing on the road, sacrificing 3.0 run of home field advantage
  • Anemic offense at just 4.5 RPG limits scoring ceiling
  • Model win probability of just 47% on the road

More MLB Picks for Thursday, July 23, 2026