New York Mets vs. Miami Marlins

Platform comparison

Active sub-markets

Market context

The Mets travel to Miami on 24 May for a 1:40 PM ET matchup against the Marlins, with settlement occurring by 31 May. Current implied probability of 40% for a Mets victory reflects moderate confidence in the home side, though the gap between the teams' 2024 records and early-season performance suggests meaningful uncertainty. For algorithmic traders, this market's resolution hinges on standard MLB official statistics; postponement triggers an extension of the settlement window rather than early closure, whilst cancellation without a rescheduled make-up game would split the pot evenly.

Historical context matters here: the Marlins have won 10 of their last 17 home games against the Mets over the past three seasons, a rate that outperforms their overall win percentage and suggests venue-specific dynamics worth weighting. The 40% probability implies roughly 60% confidence in Miami, which aligns with home-field advantage in May baseball but sits below the typical 55–65% range seen in comparable divisional matchups. Traders using conditional order logic should note that late roster moves or injury announcements in the 48 hours before first pitch—particularly regarding starting pitchers—have historically shifted these markets by 5–8 percentage points in similar fixtures.

Monitoring MLB injury reports and weather forecasts for South Florida becomes essential for systematic approaches; rain delays at loanDepot Park can favour teams with deeper bullpens, a variable that shifts expected value depending on roster composition. The settlement window's five-day buffer accommodates rain-outs common in late May, so traders should account for the possibility of extended exposure rather than same-day resolution.

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in 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.