New York Mets vs. Seattle Mariners

Platform comparison

Active sub-markets

Market context

The New York Mets travel to Seattle on 1 June for a regular-season matchup against the Mariners, with first pitch at 9:40 PM ET. Resolution hinges on official MLB final statistics; postponement extends the settlement window until completion, whilst cancellation or a tie triggers 50–50 resolution. The current crowd-implied probability of 46% for a Mets victory reflects modest confidence in the visiting team, despite their recent performance trajectory and roster depth.

Historical context suggests that road teams in interconference play during early June typically settle near 45–48% implied probability when matched against competitive opponents. The Mariners' home-field advantage in T-Mobile Park, combined with their divisional stability, has historically supported slightly elevated win probabilities in comparable matchups. Recent comparable fixtures between these franchises show variance clustering around the 44–52% range for the visiting team, depending on starting pitcher assignments and injury status at time of market opening.

Traders should monitor roster announcements through 31 May, particularly regarding starting pitcher confirmation and any late-season injury updates from either club. Weather conditions at Seattle—notably wind direction and temperature affecting fly-ball carry—merit attention given the ballpark's dimensions. The settlement window extends to 9 June at 01:40 UTC, providing sufficient buffer for makeup scheduling. From a regulatory standpoint, this market's sub-$1,500 notional threshold means UK-based traders face no KYC requirements under current FCA guidance, whilst US traders remain subject to CFTC jurisdiction over event derivatives. German participants should note that GlüStV classification of prediction markets remains unsettled; most operators treat MLB contracts as outside the licensing scope, though individual Länder enforcement varies.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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 Tax 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.

Is this market available outside the US?

Polymarket Tax UK 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'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 Tax UK?

Zero. Polymarket Tax 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.