Arizona Diamondbacks vs. St. Louis Cardinals

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Active sub-markets

Market context

The underlying real-world event is an MLB matchup between the Arizona Diamondbacks and St. Louis Cardinals at Busch Stadium, scheduled for 7:45PM ET on 25 June. The game has been postponed, extending the settlement window until completion, with crowd-implied probability currently favouring the Diamondbacks at 56% despite the Cardinals holding a -130 moneyline in pre-postponement odds [1][2].

Historically, postponed MLB games with a 50–50 tie resolution clause often see probabilities drift toward the home team once play resumes, as venue advantage reasserts itself after scheduling uncertainty. Comparable cases from the 2024 and 2025 seasons show that when a game is delayed but not cancelled, the home side’s implied win rate typically rises by 3–5% upon resumption, aligning with the Cardinals’ pre-postponement favourite status [3][4].

Traders should monitor the official MLB announcement confirming the rescheduled date, as weather dependencies and pitching rotations will be the primary catalysts. The market leans on the Cardinals’ home-field advantage and their -1.5 run-line favouritism, which suggests a higher probability of a multi-run victory once play begins [1][2]. Recent news from ESPN confirms the postponement but notes no cancellation, keeping the market open for resolution upon the next scheduled game [7].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Arizona Diamondbacks vs. St. Louis Cardinals across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. Trump Prediction routes every trade through to Polymarket — at 0% fees.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

Where can I trade this market with the lowest fees?

On Trump Prediction, 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?

Trump Prediction 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.

What does it cost to trade on Trump Prediction?

Zero. Trump Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Trump Prediction triggers a quick verification flow that finishes in minutes.