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 10 June at 7:10PM ET in a regular-season National League matchup. The crowd-implied probability stands at 51% for a Cardinals victory, suggesting near-parity in market expectations.

The Cardinals and Mets have occupied different trajectories in recent seasons, with St. Louis maintaining more consistent playoff contention whilst New York has experienced volatility. Historical head-to-head records between these franchises show marginal differences in home-field advantage effects, typically ranging 2–3 percentage points in favour of the home side. The 51% reading reflects a slight lean toward the visiting Cardinals, which diverges from the standard home-field premium observed across MLB matchups. This inversion warrants scrutiny: either the market is pricing in roster composition advantages for St. Louis or discounting the Mets' home environment more severely than historical norms suggest.

Traders should monitor starting pitcher assignments and recent bullpen usage patterns for both clubs heading into the settlement window on 17 June. Injury updates, particularly regarding key position players or relief arms, can shift probabilities materially in the final 48 hours before first pitch. Weather conditions at Citi Field—wind direction and temperature—carry measurable impact on scoring outcomes in June. Recent form streaks, win-loss records in the preceding fortnight, and head-to-head performance this season will provide concrete data points for reassessing whether the 51% Cardinals probability represents genuine value or market overconfidence in the visiting side.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.

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 Who Will Win, 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?

Who Will Win 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.

What does it cost to trade on Who Will Win?

Zero. Who Will Win 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, Who Will Win triggers a quick verification flow that finishes in minutes.