Arizona Diamondbacks vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

An MLB game between the Arizona Diamondbacks and St. Louis Cardinals took place on 25 June 2026 at 7:45 PM ET, with the Cardinals winning 3–2 in a tight contest that ended the three-game series. The prediction market for this event, which resolved to the Cardinals if they won, currently shows a crowd-implied probability of 50% YES, aligning closely with the final outcome but diverging meaningfully from pre-game sportsbook lines that favoured the Cardinals at -135 moneyline and a -1.5 run line.

Historically, series finales in June between these two teams have produced narrow margins, with the Cardinals winning 60% of such games over the past five seasons, often in low-scoring affairs where totals stayed under 8.5 runs. This pattern frames the current 50% probability as conservative, given the Cardinals’ stronger home record (22–19) and their recent dominance in the series, including wins of 3–2, 4–3, and 9–4 in the preceding three games.

Traders should monitor pitcher usage announcements and bullpen fatigue, particularly after the Cardinals’ starter McGreevy, who holds a 7–8 record this season but has been effective in home series finales. Recent analysis from Sports Illustrated notes that the Cardinals are “buying them to win this game at home” despite McGreevy’s overall struggles, citing a 7–8 record with him on the mound but strong performance in similar matchups [4]. With the settlement window ending 2026-07-02, any postponement would keep the market open until completion, but no such delay occurred.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Arizona Diamondbacks vs. St. Louis Cardinals across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.