New York Mets vs. Seattle Mariners

Platform comparison

Active sub-markets

Market context

The Mets travel to Seattle on 1 June for an evening fixture against the Mariners, with Polymarket currently pricing a Mets victory at 46% (USDC settlement on Polygon). This represents a slight lean towards the home side, reflecting Seattle's marginal advantage in the matchup. The settlement window extends to 9 June, allowing for postponements common to early summer baseball schedules.

Historical performance between these franchises shows competitive balance over recent seasons, though context-dependent factors—pitching matchups, recent form, and injury status—typically drive single-game probabilities more than head-to-head records. The Mets' 2024 campaign saw inconsistent results against West Coast opponents, whilst Seattle has demonstrated variable performance at home depending on their rotation health. Comparable June fixtures in prior years have settled near 50-50 when teams entered without significant injury disruptions, suggesting the current 46% pricing reflects modest confidence in Mariners home advantage rather than fundamental dominance.

Traders should monitor starting pitcher announcements in the days preceding the game, as rotation changes or bullpen availability often shift conditional token valuations meaningfully. Weather conditions at T-Mobile Park—notably wind direction affecting fly ball distances—occasionally influence late-model adjustments. Recent roster moves or injury reports from either organisation, typically released through MLB's official channels or team statements, can shift the probability substantially if key position players become unavailable. The game's timing at 9:40PM ET also affects liquidity patterns on Polymarket, with volume typically increasing closer to first pitch.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Is this market available outside the US?

Kalshi 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.

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 does it cost to trade on Kalshi UK?

Zero. Kalshi 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, Kalshi UK triggers a quick verification flow that finishes in minutes.