Miami Marlins vs. New York Mets

Platform comparison

Active sub-markets

Market context

The Miami Marlins travel to New York on 31 May for a regular-season matchup against the Mets, with first pitch at 1:40 PM ET. The 42% implied probability for a Marlins victory reflects their position as road underdogs in a divisional contest. Traders automating conditional orders around this market should note the settlement window extends to 7 June, allowing for postponement resolution if weather or scheduling disruptions occur—a material consideration for late-spring baseball in the Northeast.

Historical matchup data shows the Mets have held a slight edge in recent seasons, though the Marlins' performance against NL East opponents fluctuates considerably year-to-year. The current probability sits near typical road-underdog territory for teams with comparable win-loss records; programmes monitoring line movement should expect shifts if either roster reports injury updates in the 48 hours preceding game time. Pitcher assignments remain the primary catalyst—a Marlins start by a high-velocity arm could narrow the gap, whilst a Mets rotation advantage would likely reinforce the current odds.

Programmatic traders should flag that ESPN's injury reports and official MLB roster announcements typically drop 24 hours before first pitch. The Mets' home-field advantage at Citi Field historically favours their pitching matchups, though May weather patterns in New York occasionally introduce volatility. Conditional orders keyed to specific pitcher confirmations or weather alerts would capture meaningful probability shifts before market-wide repricing occurs.

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

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 Polymarket Review 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'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 Polymarket Review UK?

Zero. Polymarket Review UK 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, Polymarket Review 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.