New York Mets vs. Philadelphia Phillies

Platform comparison

Active sub-markets

Market context

The New York Mets and Philadelphia Phillies are scheduled to meet at Citizens Bank Park on 21 June at 7:20pm ET, with the market priced at 44% YES on a Mets win. The most direct read on that number is that the market is treating Philadelphia as a modest favourite, which is consistent with a home game and with the clubs arriving after the Phillies’ 15-3 win over New York on 20 June, a result that can shift short-term momentum without changing the underlying season-long match-up structure.[4][7]

Comparable Mets–Phillies spots are usually best read through starting-pitching confirmation, lineup news and whether the game reaches first pitch as scheduled rather than being pushed back by weather. ESPN and other live game trackers show the contest as a same-day MLB fixture, but the settlement mechanics mean a postponement keeps the market open until the game is completed, while a cancellation or tie would force a 50-50 outcome instead of a team win.[3][5] That makes late schedule changes and bullpen usage more relevant than headline scorelines from the previous night.

From a market-access angle, this is the kind of sports contract that can sit inside a broader regulatory split: German GlüStV restrictions can affect whether a user can participate at all from Germany, while US CFTC reach matters because some prediction-market activity may sit in a legally sensitive grey zone for US persons. “No-KYC up to $1,500” generally means smaller-value access without full identity verification, which lowers onboarding friction for this specific market but does not remove geo-blocking, platform controls, or any jurisdiction-based limits on who can trade.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track New York Mets vs. Philadelphia Phillies 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Legal 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.

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 it cost to trade on Polymarket Legal UK?

Zero. Polymarket Legal UK 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, Polymarket Legal UK triggers a quick verification flow that finishes in minutes.