New York Mets vs. Washington Nationals

Platform comparison

Active sub-markets

Market context

The New York Mets are priced as a 100% favourite in this market against the Washington Nationals, which leaves no visible room for disagreement in the current crowd view. In practice, that sort of price usually reflects either a stale listing, a mis-specified feed, or heavy one-sided conviction rather than a genuinely risk-free baseball outcome. For handicappers, the useful comparison is not whether the favourite should win, but whether the market has over-committed: MLB moneyline prices are rarely cleanly certain, and even strong teams lose regularly in one-off games.

The main angle to watch is whether the scheduled May 19 matchup is still set to be played as listed, because postponement or rescheduling changes the settlement timing and can keep the market open well beyond the original window. ESPN’s game listing shows the fixture at Nationals Park, with the Mets 21-27 and the Nationals 24-25, which is not a profile that normally supports a true 100% favourite. That makes the Nationals the obvious contrarian side if the market is indeed mispriced, though any value case depends on confirmed line-ups, starting pitchers and whether the game is actually moved or completed as a make-up.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track New York Mets vs. Washington Nationals on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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.

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 PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.