Miami Marlins vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The real-world event is an MLB game between the Miami Marlins and the St. Louis Cardinals, scheduled for 8:15pm ET on 26 June at Busch Stadium in St. Louis. In prediction markets, a YES share pays out if the market’s condition is met (here, that the Marlins win), while a NO share pays out if it is not met. This specific market resolves to “Miami Marlins” only if they win; if the Cardinals win, it resolves to them, and a cancellation or tie results in a 50–50 split.

Historically, markets with 100% crowd-implied probability for a single team to win are rare in MLB, where even favoured sides often lose due to pitching variability or late-inning rallies. Comparable cases show that such extreme consensus usually reflects a perceived mismatch in starting pitchers or recent form, yet outcomes can still defy expectations if a key player is injured or a bullpen collapses. Traders should watch for pre-game lineup announcements, pitcher health updates, and any weather delays that could alter the starting rotation. Recent MLB previews note Max Meyer’s strong start for the Marlins and Alec Burleson’s on-base streak for the Cardinals, both factors that could shift the game’s momentum [4].

Monitor official team announcements from MLB.com and ESPN for any late changes to the starting pitchers or batting orders, as these are the primary catalysts that could invalidate the 100% YES probability [1]. If the game is postponed, the market remains open until completion, so check the MLB schedule for make-up dates. No moralising is needed on whether to trade; the facts are that the probability is extreme, the dependencies are clear, and the settlement window ends on 4 July 2026.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Market UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Market UK, 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?

Prediction Market UK 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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 Prediction Market UK?

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