St. Louis Cardinals vs. New York Mets

Platform comparison

Active sub-markets

Market context

The St. Louis Cardinals face the New York Mets on 11 June at 1:10 PM ET in a regular-season MLB matchup. The settlement window extends to 18 June, accommodating potential postponements. The 0% implied probability on this prediction market contrasts sharply with typical sportsbook pricing for regular-season games, where both teams ordinarily command measurable win probabilities. This extreme divergence suggests either minimal trading activity on the contract or a technical issue with market initialisation, rather than genuine certainty about the outcome.

Historical precedent indicates that single-game MLB markets rarely settle at extreme probabilities unless external factors—cancellation, venue closure, or roster catastrophe—have materialised. The Cardinals and Mets are both active franchises with full rosters expected to compete. Comparable June matchups across prediction markets typically reflect starting-pitcher quality, recent form, and home-field advantage, with favourites generally priced between 52% and 58% depending on context. The current 0% reading falls outside normal variance for games between established teams.

Traders monitoring this contract should track roster announcements and weather forecasts through mid-June, particularly given the settlement window's length. Any official postponement notice would keep the market open until completion. Starting-pitcher assignments—typically confirmed 24–48 hours before first pitch—historically shift comparable markets by 3–5 percentage points. Recent injury reports or trades affecting either team's lineup would similarly influence fair-value pricing once the market reflects genuine trading interest.

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Best Prediction Markets 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.

What does it cost to trade on Best Prediction Markets UK?

Zero. Best Prediction Markets UK 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.