New York Mets vs. Washington Nationals

Platform comparison

Active sub-markets

Market context

Polymarket is pricing this baseball contract at 100% YES, so the market is effectively treating a Mets win as fully locked in on-chain. On Polygon, traders are swapping USDC against conditional tokens that settle against the official final result, not the pre-game line, so the practical question is whether there is any residual path to a washout, postponement, or other non-standard outcome before the game is officially recorded. When a market is pinned at 100, there is usually no live disagreement left in the order book; the only remaining risk is a settlement edge case rather than the matchup itself.

That sort of pricing is consistent with a game that has already been decided or otherwise removed from normal uncertainty. Comparable baseball contracts tend to jump to the extremes only after a final score, an official postponement decision, or a clear scheduling change closes off most scenarios. The key point for Polymarket users is that the contract’s value is driven by the event resolution mechanics as much as by the teams, because a cancelled game with no make-up would still resolve 50-50 under the market rules. In other words, 100% YES reflects confidence in the resolution pathway, not just the Mets’ on-field position.

For traders watching the final hours, the main catalysts are official MLB scheduling updates, any announcement of a make-up date, and whether the game is marked completed in the league’s final statistics. ESPN’s game listing and MLB’s game story are the cleanest public reference points for completion status, while the market itself settles from the recognised official result. If there is no delay or cancellation, the conditional tokens should resolve once the game is officially final; if the fixture slips, the contract stays open until completion.

Sources: 1 · 2 · 3 · 4 · 5

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 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.

Is this market available outside the US?

PolyGram 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'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 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.