Miami Marlins vs. New York Mets

Platform comparison

Active sub-markets

Market context

The Miami Marlins travel to Queens on 31 May for a 1:40 PM ET matchup against the New York Mets in a National League East divisional contest. Resolution hinges on the official final score recorded by MLB, with the settlement window extending to 7 June to accommodate any postponements. The current 42% implied probability for a Marlins victory reflects moderate backing, though this sits notably below historical benchmarks for road teams in comparable matchups during late May.

Divisional games between these franchises have historically tilted toward the home team at roughly 55–60% frequency over the past three seasons, suggesting the Mets' home-field advantage carries material weight. Recent Marlins-Mets contests have shown tight margins, with neither club establishing sustained dominance in head-to-head records. A trader automating position sizing through conditional orders would benefit from monitoring starting pitcher announcements—typically confirmed 48 hours prior—as pitching matchups shift win probability by 3–7 percentage points in comparable MLB fixtures.

Operational considerations for programmatic tracking include tracking roster updates through MLB's official injury reports and weather conditions at Citi Field, which can influence over-under totals and thus game flow. The settlement mechanism's 50-50 tie provision is technically relevant but historically immaterial; no MLB game has ended in a tie since 2002. Traders integrating this market into broader portfolio hedges should note the resolution source's reliance on official MLB statistics, eliminating ambiguity around scoring disputes or review outcomes.

Methodology

We track Miami Marlins vs. New York Mets 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 Polymarket App UK, 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.

What does it cost to trade on Polymarket App UK?

Zero. Polymarket App UK 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket App UK 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.