New York Mets vs. Miami Marlins

Platform comparison

Active sub-markets

Market context

The New York Mets are due to play the Miami Marlins at Citi Field in this National League East matchup. In a prediction market, a YES share pays out if the Mets win, while a NO share pays out if Miami wins; if the game is postponed, the market stays open until the rescheduled game is completed, and a cancelled or tied game would settle 50-50 under the rules provided.

The crowd price of 49% YES suggests a near coin-flip rather than a strong view either way. That fits the recent shape of both clubs: ESPN lists the Mets at 22-28 and the Marlins at 22-29, with New York’s home record better than Miami’s away mark. Their season-to-date numbers are also close enough to explain the muted pricing, with the Marlins slightly ahead in batting average, on-base percentage and slugging, while the Mets have marginally more home runs. Recent head-to-heads have also been mixed rather than one-sided, so the market is effectively weighing home field against broadly similar overall form.

For traders, the main things to watch are the confirmed starting pitchers, any late line-up changes and whether the game proceeds as scheduled. FOX Sports’ upcoming listing for a later Mets-Marlins meeting at Citi Field notes Mets starter McLean and a 8:10 pm local start, underlining how much the pitching assignment can move these matchups; for the May 22 game, the official line-up cards and pre-match injury news will matter most. Because the settlement window runs to 29 May, any weather-related postponement would keep the market open rather than force an immediate result.

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

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 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.

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.

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.