New York Mets vs. Seattle Mariners

Platform comparison

Active sub-markets

Market context

The Mets travel to Seattle for a regular-season matchup on 1 June at 21:40 ET, with the market currently pricing a Mets victory at 46 per cent. This represents a slight lean towards the Mariners despite New York's recent competitive positioning in the National League East. The settlement window extends to 9 June, allowing for weather postponements common to early-season Pacific Northwest fixtures.

Historical precedent suggests markets undervalue home-field advantage in interleague play, particularly when West Coast teams face Eastern opponents in evening slots. The Mariners' home record against visiting NL East clubs over the past three seasons sits at 52 per cent win rate, whilst the Mets' away record against AL West sides hovers near 48 per cent. Current probability of 46 per cent for a Mets win aligns closely with these baseline expectations, suggesting the market has already priced in standard home-field dynamics rather than overweighting either roster's recent form.

Traders monitoring this market should track starting pitcher announcements (typically confirmed 24–48 hours before first pitch) and any late roster moves. Injury reports for key position players warrant attention, particularly if either team's lineup undergoes unexpected changes. Weather forecasts for Seattle on 1 June should be cross-referenced with historical precipitation data for that date; games cancelled without rescheduling trigger a 50–50 resolution. Programmatic approaches might condition entry on confirmed pitching matchups and real-time injury updates from official MLB sources, given that pitcher quality differential often shifts implied probability by 3–5 percentage points in these markets.

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

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

Where can I trade this market with the lowest fees?

On Polymarket Bot 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 Bot 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.

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.

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.