Miami Marlins vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The underlying real-world event is the Major League Baseball game between the Miami Marlins and the St. Louis Cardinals, played on Friday 26 June at 8:15pm ET at Busch Stadium in St. Louis. The Marlins, fresh from a five-win homestand, face the Cardinals in a three-game series where pitcher Max Meyer has posted a 3-0 record with a 2.31 ERA over his last four starts [2][4].

Historical precedents for similar MLB matchups show that crowd-implied probabilities of 100% often reflect late-stage certainty after key injuries or lineup confirmations, rather than inherent impossibility of the opposing outcome. Comparable cases from the 2024 and 2025 seasons reveal that such extreme probabilities typically resolve to the favoured side only when no major weather disruptions or roster changes occur post-betting, framing the current 100% as a signal of settled market confidence rather than a guarantee [1][7].

Traders should monitor official MLB announcements regarding starting pitchers and any weather-related postponements, as these dependencies directly impact settlement. The Athletic’s live box score coverage confirms real-time data flows that serve as the primary resolution source, while USA Today’s broadcast details highlight the importance of verifying game completion through official channels [3][7]. Under German GlüStV and US CFTC frameworks, markets offering no-KYC access up to £1,500 enhance accessibility for retail participants, though this does not alter the regulatory obligations of the platform itself.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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 Polymarket KYC 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.

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.

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.

Do I need to KYC for this market?

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