Miami Marlins vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The Miami Marlins and St. Louis Cardinals met at Busch Stadium on 26 June 2026 for an 8:15pm ET MLB game, with the contest already completed and the Marlins securing a decisive victory. Historical precedents in MLB where a team enters with a 100% crowd-implied probability of winning often reflect either a postponed game being resolved retroactively or a scenario where the outcome was known before the market closed, rather than a genuine prediction of an uncertain contest. In comparable cases, such absolute probabilities typically signal that the event has concluded, and the market is merely formalising the result, which aligns with the Marlins’ 42–39 season record and their recent 8–0 away form cited in live score data[1].

Traders should monitor official MLB announcements regarding game status, particularly any notices of postponement or cancellation that might delay resolution, though the completed nature of this fixture suggests no such dependencies remain. Key catalysts include Max Meyer’s 3–0 record with a 2.31 ERA over 23⅓ innings in his last four starts, which significantly bolstered the Marlins’ pitching strength[4], and Alec Burleson’s 23-game on-base streak that extended the Cardinals’ offensive consistency[4]. Recent beat reporting from The Athletic confirms the final box score and validates the Marlins’ win, removing ambiguity about the outcome[6]. With the settlement window ending 4 July 2026, the market’s 100% YES probability now serves as a confirmation of the Marlins’ triumph rather than a forecast.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Miami Marlins vs. St. Louis Cardinals on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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

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 PolyGram?

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

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, PolyGram triggers a quick verification flow that finishes in minutes.