Prediction markets put the probability at 44%: Arizona Diamondbacks vs. St. Louis Cardinals. Currently, markets are divided (44% YES, 56% NO). Arizona Diamondbacks @ St.
The Arizona Diamondbacks vs. St. Louis Cardinals series has shifted dramatically after a dramatic 4-3 victory for Arizona on June 23, 2026, giving the Diamondbacks a 2-1 lead in the four-game set. All runs were scored in the ninth inning, with Nolan Arenado and Lourdes Gurriel Jr. delivering RBI hits before the winning run crossed on a passed ball charged to Cardinals catcher Iván Herrera. The win improved Arizona’s record to 41-39, while St. Louis fell to 42-36. The Diamondbacks, who managed just three hits through the first eight innings, now hold a one-game advantage in the series with one contest remaining. [AP, Jun 24]
The current probability of 44% YES / 56% NO reflects the market’s assessment of the series outcome, with the Diamondbacks’ comeback win injecting uncertainty into the final game. St. Louis entered the series with a strong 22-18 home record, but Arizona’s resilience on the road—where they are 17-22 overall—has been a key factor. The Cardinals’ bullpen, which allowed the ninth-inning collapse, faces scrutiny, while Arizona’s ability to manufacture runs late in games has been a recurring theme. The series finale, scheduled for June 25 at Busch Stadium, will determine whether St. Louis can even the series or if Arizona can secure a road series win. [ESPN, Jun 25]
Injury reports could influence the final game’s dynamics. The Cardinals placed James McCann (10-day IL) and relievers Derek Law (7-day IL) and Ryan Fernandez (15-day IL) on the injured list on June 26, while Arizona’s A.J. Vukovich remains on the 60-day IL. The Diamondbacks’ starting rotation, which held St. Louis to three runs through eight innings in Game 3, will look to replicate that performance. The outcome of this series carries playoff implications: Arizona sits third in the NL West, while St. Louis is second in the NL Central, with both teams jockeying for wild-card positioning. [ESPN, Jun 26]
Lower-volume market on Polymarket ($54K). Wider spreads expected — enter with limit orders and be aware of slippage risk. Currently 44c YES.
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