New York Mets vs. Miami Marlins

Platform comparison

Active sub-markets

Market context

The Mets travel to Miami for a May 23rd afternoon fixture against the Marlins, with the crowd-implied probability sitting at 2% for a New York victory. This reflects heavy favouring of the home side, though the settlement window extends to late May 2026, suggesting either a delayed resolution mechanism or a data entry anomaly worth noting for traders.

The Marlins have historically struggled to maintain competitive rosters, but Miami's home record against divisional opponents typically runs stronger than their overall win-loss suggests. The 2% probability for the Mets implies near-prohibitive underdog status—a positioning that warrants scrutiny when facing a franchise with structural disadvantages. Recent seasons show the Mets, despite inconsistency, perform reasonably in road matchups against weaker AL East competition. The implied probability here sits well below typical preseason projections for such fixtures, where visiting teams from stronger divisions usually command 35–45% implied odds.

Traders should monitor roster availability in the days preceding May 23rd, particularly regarding starting pitcher assignments and any late-season injury reports from either camp. Weather conditions at loanDepot Park—Miami's notoriously humid May afternoons—can favour certain pitching profiles. The extended settlement window through May 2026 creates ambiguity; confirmation of whether this reflects a rescheduled game or a data error would clarify whether the current odds reflect genuine matchup assessment or technical miscalibration. Recent Mets–Marlins head-to-head records and bullpen depth charts merit review before committing capital at these extreme odds.

Methodology

We track New York Mets vs. Miami Marlins 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

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 PolyGram, 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?

PolyGram 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 PolyGram?

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

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.