St. Louis Cardinals vs. New York Mets

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Active sub-markets

Market context

The St. Louis Cardinals travel to face the New York Mets on 9 June at 7:10 PM ET in a regular-season matchup. Resolution hinges on the official final result recorded by MLB; postponement triggers an extension of the settlement window, whilst cancellation without a rescheduled make-up game or any tie result would split the market 50-50 between both outcomes.

A 100% crowd-implied probability suggests near-certain market consensus, though this typically reflects either extreme confidence in one team's superiority or insufficient liquidity to establish genuine price discovery. Historical precedent shows such extremes often correlate with lopsided matchups—teams with significantly stronger records, home-field advantage, or superior starting pitching rotations. The Cardinals and Mets' respective standings, recent form, and head-to-head records from the 2024 season would provide baseline calibration; teams with winning records against divisional opponents rarely trade below 55-60% implied probability in comparable fixtures.

Traders monitoring this market programmatically should track roster announcements through 8 June, particularly injury reports affecting starting pitchers or key position players. Weather conditions at Citi Field merit attention, as June precipitation can influence game dynamics and postponement risk. MLB's official injury database and team announcements typically release updates by 1 PM ET on game day. Conditional order logic should account for the 50-50 tie resolution clause—whilst rare, weather-related cancellations without rescheduling have occurred in recent seasons. The settlement window extends to 16 June, providing a five-day buffer for makeup games if postponement occurs.

Methodology

We track St. Louis Cardinals vs. New York Mets 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

Where can I trade this market with the lowest fees?

On Polymarket Bot 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?

Polymarket Bot 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.

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.