Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
54% | 46% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
54% | 46% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Philadelphia Phillies vs. St. Louis Cardinals | 54% |
| O/U 4.5 | 52% |
| 1st 5 Innings Spread -1.5 | 50% |
| Extra Innings | 50% |
| O/U 5.5 | 41% |
| Spread -1.5 | 36% |
| O/U 6.5 | 32% |
| Spread -1.5 | 25% |
| Spread -2.5 | 24% |
| O/U 7.5 | 21% |
| 1st 5 Innings O/U 2.5 | 20% |
| O/U 8.5 | 19% |
| 1st 5 Innings Spread -1.5 | 18% |
| Spread -2.5 | 13% |
| 1st 5 Innings O/U 3.5 | 12% |
| O/U 9.5 | 10% |
| 1st 5 Innings O/U 4.5 | 9% |
| 1st 5 Innings O/U 5.5 | 8% |
| 1st 5 Innings O/U 6.5 | 8% |
| NRFI | 0% |
Market context
The Philadelphia Phillies beat the St. Louis Cardinals 6-5 on Monday night, so the market’s **54%** crowd-implied YES price is only a modest lean towards the Phillies despite that recent result.[1][2][3] That kind of pricing fits a matchup between teams that have both been competitive rather than dominant: AP described Philadelphia as coming in on a three-game road win streak, while St. Louis had been near .500 at home, and recent head-to-head history has tilted slightly towards Philadelphia over a larger sample.[7][17] In other words, the market is not treating Monday’s one-run finish as a decisive signal; it looks more like a close game being repriced by form and venue than a clear mismatch.[1][7]
For traders, the main catalysts are starting-pitcher and lineup confirmation, plus any late injury news. CBS Sports’ live game tracker said Cristopher Sánchez was set to start and noted he had been less effective since mid-June, carrying a 4.47 ERA over his previous 10 outings, which matters if the Phillies are being priced as the slight favourite.[4] AP’s recent preview also flagged several roster items to watch, including Aaron Nola as day-to-day for Philadelphia and Ramón Urías on the Cardinals’ 60-day injured list, while Kyle Schwarber and Bryce Harper remained key recent bats for the Phillies and Alec Burleson and Jordan Walker were among St. Louis’ most productive hitters.[7][18] Any change to the announced starters, a late scratch, or a rain delay pushing the game back would be the most relevant dependency for the market’s final settlement path.
Live Data & Statistics
Live stats load when the match begins. Current market odds are shown above. Trading volume: $254K.
Methodology
Sports-specific comparison page for Philadelphia Phillies vs. St. Louis Cardinals. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
UK Frequently Asked Questions
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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