New York Mets vs. Seattle Mariners

Platform comparison

Active sub-markets

Market context

The New York Mets travel to Seattle for a regular-season MLB fixture on 3 June at 3:40 PM ET, with the market settlement window extending to 10 June to account for potential postponements. The 100% implied probability reflects either an exceptionally lopsided expectation or a technical artefact; in practice, single-game MLB outcomes rarely command such certainty given the inherent variance of baseball competition.

Historical context matters here. The Mets and Mariners have played infrequently in recent seasons, limiting direct head-to-head patterns that might anchor trader confidence. What does move single-game lines is roster composition: the Mets' recent injury status, particularly among starting pitchers and core position players, directly influences their competitive posture. Similarly, Seattle's offensive depth and bullpen availability shape their ability to compete. As of late May 2026, monitoring official MLB roster announcements and injury reports from both organisations' official channels remains essential, as late-game scratches or roster adjustments can materially shift expected run production.

Traders should track weather forecasts for Seattle (rain delays are common in early June) and any last-minute pitching changes announced within 24 hours of first pitch. The settlement mechanism's provision for rescheduling means the market remains live through 10 June; if the original fixture postpones, the underlying game dynamics may shift substantially depending on which relievers have been deployed in intervening contests. Confirmation of starting pitchers and any unexpected roster moves should be cross-referenced against official MLB and team sources before positions are finalised.

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 Champions League Prediction, which mirrors the Polymarket order book directly.

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 Champions League Prediction, 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 Champions League Prediction?

Zero. Champions League Prediction 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, Champions League Prediction 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.