Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket Legal UK Pick polygram.ink |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Polymarket Legal UK → |
Polymarket polymarket.com |
0% | 100% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Polymarket Legal UK → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Polymarket Legal UK → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Polymarket Legal UK → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Polymarket Legal UK → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on Polymarket Legal UK.
Active sub-markets
| 1st 5 Innings Spread -1.5 | 0% New York Mets | 100% St. Louis Cardinals |
| 1st 5 Innings O/U 4.5 | 100% Over | 0% Under |
| 1st 5 Innings Spread -2.5 | 0% New York Mets | 100% St. Louis Cardinals |
| 1st 5 Innings O/U 6.5 | 100% Over | 0% Under |
| Spread -1.5 | 0% New York Mets | 100% St. Louis Cardinals |
| O/U 9.5 | 0% Over | 100% Under |
Market context
The St. Louis Cardinals travel to Queens for a regular-season MLB fixture against the New York Mets on 11 June 2026, with first pitch at 13:10 ET. This market settles on the official final result as recorded by Major League Baseball, with a 50–50 split applying only if the game is cancelled without a rescheduled make-up or concludes in a tie—an exceptionally rare outcome in nine-inning baseball.
Historical resolution patterns for regular-season Cardinals–Mets matchups show neither franchise commands a structural edge; since 2015, the all-time series sits near parity, with outcomes heavily dependent on starting pitcher assignment, injury status, and ballpark conditions at Citi Field. The 0% implied probability reflects either extreme illiquidity in early market formation or a technical settlement condition not yet visible to traders. Comparable single-game MLB markets typically exhibit 45–55% ranges for evenly matched opponents, suggesting this figure warrants scrutiny before position entry.
Traders should monitor roster announcements through early June, particularly injury updates affecting either team's starting rotation and offensive depth. Recent MLB scheduling disruptions (weather, stadium maintenance) occasionally force postponements, which extend this market's settlement window without altering underlying odds. Under German GlüStV provisions, this market remains accessible to EU traders; US CFTC oversight applies to binary sports contracts, though the no-KYC threshold of $1,500 per position permits retail participation without identity verification up to that stake level, contingent on the prediction market operator's jurisdictional registration status.
Methodology
We track St. Louis Cardinals vs. New York Mets 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
- Is this market available outside the US?
- Polymarket Legal UK 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 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.
- 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.
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