New York Mets vs. Miami Marlins

Platform comparison

Active sub-markets

Market context

The New York Mets face the Miami Marlins on 23 May at 4:10 PM ET in a regular-season Major League Baseball fixture. Resolution hinges on the official final score as recorded by MLB; postponement extends the market window until completion, whilst cancellation without a rescheduled make-up game or any tied result triggers a 50-50 split. The settlement deadline of 30 May at 20:10 UTC provides a one-week buffer for fixture completion and official confirmation.

The 4% implied probability for a Mets victory reflects their stronger recent form and roster depth relative to Miami, though the Marlins remain competitive within the National League East. Historical matchups between these division rivals show volatility; single-game outcomes in May carry less predictive weight than season-long trends, and injuries to key players can shift probabilities substantially. The crowd's assessment suggests confidence in Miami's chances, though such markets often exhibit recency bias following recent head-to-head results.

From a regulatory standpoint, this market's accessibility varies by jurisdiction. Under German GlüStV provisions, sports prediction markets require specific licensing; traders in Germany should verify their platform's authorisation. US CFTC oversight applies to derivatives-style prediction contracts, though binary sports outcomes occupy a contested space. The "no-KYC up to $1,500" threshold common in some prediction market jurisdictions means traders can participate without identity verification below that stake level, though this market's host determines actual KYC requirements. Traders should confirm their local regulatory status before placing positions, as sports betting and prediction market rules differ substantially across territories.

Methodology

This page reviews New York Mets vs. Miami Marlins across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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 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.

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 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.