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 Major League Baseball fixture. The market resolves to the Cardinals if they win, to the Mets if they win, and 50-50 if the game is postponed without completion or cancelled outright. The settlement window closes on 16 June 2026 at 23:10 UTC, allowing a week for rescheduling should weather or unforeseen circumstances delay play.

The 100% implied probability reflects either a technical artefact in the odds feed or an extreme consensus among traders that one outcome dominates. Historical comparison with similar single-game MLB markets shows that crowd-implied probabilities above 95% typically signal either a significant roster advantage (injury to a key pitcher, for instance) or a data-lag issue where early trading has not yet adjusted to fresh information. The Cardinals and Mets have played 1,500+ games against each other since 1962, with neither club holding a decisive structural advantage in June matchups. Such extreme probabilities warrant scrutiny of recent roster announcements or weather forecasts that might justify the skew.

Traders should monitor pitching assignments and bullpen availability in the days preceding the fixture. Starting pitcher confirmation typically arrives 24–48 hours before game time; injuries or illness to frontline starters materially shift win probability. Weather conditions in New York—particularly rain forecasts—carry settlement risk given the postponement clause. Recent team form, home-field advantage at Citi Field, and any mid-season trades or call-ups announced between now and 9 June will influence actual competitive balance. The MLB official schedule and team injury reports remain the primary information sources for recalibrating odds away from the current extreme reading.

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

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 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.

Is this market available outside the US?

Polymarket KYC 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 does it cost to trade on Polymarket KYC UK?

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

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.

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.