New York Mets vs. Miami Marlins

Platform comparison

Active sub-markets

Market context

The Mets travel to Miami on 23 May for a regular-season matchup against the Marlins, with first pitch at 4:10 PM ET. The 2% implied probability reflects the Mets' stronger roster composition and recent performance trajectory relative to the Marlins, though this represents a single game rather than a series, where variance plays a substantial role. Settlement occurs 30 May at 20:10 UTC, allowing for potential postponements within a week-long window.

Historical context suggests that single-game MLB markets between teams of disparate quality typically see the favourite priced between 55–70%, depending on pitching matchups and recent form. The Mets' 2% probability sits at the extreme tail of this distribution, indicating either exceptional circumstances—such as a critical injury to their starting pitcher or a Marlins hot streak—or market mispricing. Comparable May matchups between mid-tier NL East clubs have occasionally resolved counterintuitively when backup pitchers took the mound or weather conditions favoured the underdog's approach.

Traders should monitor roster updates through late May, particularly injury reports affecting starting pitchers for either side. Pitching matchup announcements typically arrive 3–5 days before game day; a Mets starter with recent poor form or a Marlins pitcher returning from injury could materially shift the probability. Weather forecasts for Miami in late May should be tracked programmatically, as heat and humidity occasionally influence game dynamics. The resolution source is official MLB statistics, making this straightforward for conditional order logic, though the postponement clause means traders should account for a potential settlement delay if weather forces a reschedule.

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

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 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 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.