New York Yankees vs. Philadelphia Phillies

Platform comparison

Market context

The Yankees–Phillies game is trading at **44% YES** on Polymarket, so the contract is slightly below a coin flip and is pricing a modest Phillies edge on the current USDC market[1]. For Polymarket users, that means the conditional token tied to a Yankees win is being valued at less than half of face value on Polygon, with the usual late-move sensitivity if line-ups, pitching or weather shift before first pitch[1].

A 44% price is consistent with a fixture that can swing quickly on starting pitcher confirmation, rest days and batting-order news, especially in a cross-league matchup where pre-game markets often reprice after official line-ups land. Similar baseball contracts tend to sit close to 50% until the market gets a clearer read on availability and rotation context, then move more sharply in the last few hours as traders react to the same official inputs that decide the game[1].

The main catalysts here are the confirmed starters, any last-minute injuries or scratches, and whether the 6:45 PM ET schedule holds without delay, because a postponement keeps the market open until completion rather than forcing settlement[1]. If the game is cancelled entirely, or ends in a tie, the contract resolves 50-50, so traders also need to watch for weather and scheduling changes that could affect whether the game is completed on the stated date[1].

Methodology

This page is a comparison snapshot: one live quote, 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

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.