New York Mets vs. Philadelphia Phillies

Platform comparison

Active sub-markets

Market context

The Mets are playing the Phillies at Citizens Bank Park in Philadelphia on 21 June, with first pitch set for 7:20 p.m. ET. The crowd-implied **44% YES** sits below the game-level preview market, where third-party odds models pointed to the Phillies at about **53.4%** to win, so the current price reads as a modest lean towards Philadelphia rather than a neutral coin flip.[1][2]

For historical framing, it is useful that this is a divisional meeting between teams with contrasting recent records in the listed preview, with the Phillies at 41-35 and the Mets at 34-42 before first pitch.[1] MLB matchups like this often move on starting pitching and late line changes, and MLB’s own preview highlighted Zack Wheeler’s strong recent run against New York, posting a **1.44 ERA** in four starts versus the Mets since the start of 2024, which is the kind of pitcher-vs-lineup edge traders tend to price quickly.[5]

For accessibility, the market is typically available to users who can pass a light-touch onboarding regime, with “no-KYC up to $1,500” meaning smaller participation can be offered without full identity verification, while higher limits generally trigger stronger checks. That sits alongside two jurisdictional overlays: German GlüStV rules can affect whether a resident can legally access or use regulated betting-style products, and US CFTC reach matters because event contracts tied to sports outcomes may face heightened scrutiny depending on venue and operator structure. The practical catalysts to watch are any late starting-pitcher changes, weather or postponement risk, and lineup/news updates close to the 7:20 p.m. ET start, because postponement would keep the market open until completion and a cancellation would resolve 50-50.

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket KYC 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.

Do I need to KYC for this market?

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