New York Mets vs. Miami Marlins

Platform comparison

Active sub-markets

Market context

The New York Mets visit the Miami Marlins at loanDepot Park on 22 May, with the market sitting close to a coin flip at 49% YES for New York. ESPN lists both clubs at 22-28 overall, with the Mets 11-15 away and the Marlins 15-14 at home, so the price is being driven more by venue and short-run form than by season record.

Recent results tilt only slightly towards Miami’s home edge. The Marlins have the better batting line on ESPN’s team page, with a .245 average and .321 on-base percentage against the Mets’ .231 and .296, while New York has the stronger slugging edge only marginally at .358 to .376. Miami also comes in off a 9-3 loss to Atlanta on 21 May, while the Mets beat Washington 2-1 the same day, which keeps both clubs in the sort of low-margin form that often leaves a 49-51 market highly sensitive to one lineup change.

The key watch point is the starting pitchers and any late batting-order news once line-ups are posted, because a one-run game profile can swing quickly if either side rests a regular or scratches a starter. ESPN has the series listed with the May 24 rematch at the same park, so this first meeting may also shape how aggressively each manager handles the bullpen ahead of the weekend set.

Sources: 1 · 2 · 3 · 4 · 5

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

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 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, PolyGram triggers a quick verification flow that finishes in minutes.