Miami Marlins vs. New York Mets

Platform comparison

Active sub-markets

Market context

The Miami Marlins travel to Queens to face the New York Mets on 31 May at 1:40 PM ET in a regular-season National League East matchup. The current prediction-market implied probability of 42% for a Marlins victory sits notably below the typical sportsbook consensus, which has generally favoured the Mets at around −115 to −120 moneyline odds (equivalent to roughly 54% implied probability). This 12-point divergence between prediction-market pricing and conventional betting lines warrants scrutiny, particularly given the Mets' recent form and roster depth advantage heading into the contest.

Historical matchups between these clubs show the Mets have held a structural edge in head-to-head records over the past three seasons, though the Marlins have proven capable of competitive performances in division play. The current 42% probability reflects moderate confidence in a Mets outcome rather than overwhelming favouritism, suggesting the market has priced in meaningful uncertainty around starting pitching performance and late-inning execution—both variables that have historically driven volatility in Mets-Marlins contests.

Key variables for traders include confirmation of starting-pitcher assignments, which typically emerge 24–48 hours before first pitch, and any roster adjustments announced through official MLB channels. Recent injury updates to either bullpen or position-player depth could shift the probability meaningfully. The settlement window extends to 7 June, providing ample time for postponement resolution should weather or scheduling complications arise, though the late-May timing typically presents lower weather risk in the Northeast.

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 Best Prediction Markets, 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 Best Prediction Markets, 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.

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.