Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
97% | 3% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
97% | 3% | 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 |
|---|---|
| Pete Crow-Armstrong | 97% |
| Kyle Schwarber | 2% |
| Aaron Judge | 0% |
| Shohei Ohtani | 0% |
| Cal Raleigh | 0% |
| Eugenio Suarez | 0% |
| Juan Soto | 0% |
| Junior Caminero | 0% |
| Pete Alonso | 0% |
| Nick Kurtz | 0% |
| Rafael Devers | 0% |
| George Springer | 0% |
| Giancarlo Stanton | 0% |
| Mike Trout | 0% |
| Manny Machado | 0% |
| Matt Olson | 0% |
| James Wood | 0% |
| Yordan Alvarez | 0% |
| Munetaka Murakami | 0% |
| Ben Rice | 0% |
| Jordan Walker | 0% |
| Brandon Lowe | 0% |
| Sal Stewart | 0% |
| CJ Abrams | 0% |
| Elly De La Cruz | 0% |
| Shea Langeliers | 0% |
| Hunter Goodman | 0% |
| Player C | 0% |
| Player D | 0% |
| Player E | 0% |
| Player F | 0% |
| Player G | 0% |
| Player H | 0% |
| Player I | 0% |
| Player J | 0% |
| Player K | 0% |
| Player L | 0% |
| Player M | 0% |
| Player N | 0% |
| Player O | 0% |
| Player P | 0% |
| Player Q | 0% |
| Player R | 0% |
| Player S | 0% |
| Player T | 0% |
| Player U | 0% |
| Player V | 0% |
| Player W | 0% |
| Player X | 0% |
| Player Y | 0% |
| Player Z | 0% |
| Player AA | 0% |
| Player AB | 0% |
| Player AC | 0% |
| Player AD | 0% |
| Player AE | 0% |
| Player AF | 0% |
| Player AG | 0% |
| Player AH | 0% |
| Player AI | 0% |
| Player AJ | 0% |
| Player AK | 0% |
| Player AL | 0% |
| Player AM | 0% |
| Player AN | 0% |
| Player AO | 0% |
| Player AP | 0% |
| Player AQ | 0% |
| Player AR | 0% |
| Player AS | 0% |
| Player AT | 0% |
| Player AU | 0% |
| Player AV | 0% |
| Player AW | 0% |
| Player AX | 0% |
| Player AY | 0% |
| Player AZ | 0% |
| Player BA | 0% |
| Player BB | 0% |
| Player BC | 0% |
| Player BD | 0% |
| Player BE | 0% |
| Player BF | 0% |
| Player BG | 0% |
| Player BH | 0% |
| Player BI | 0% |
| Player BJ | 0% |
| Player BK | 0% |
| Player BL | 0% |
| Player BM | 0% |
| Player BN | 0% |
| Player BO | 0% |
| Player BP | 0% |
| Player BQ | 0% |
| Player BR | 0% |
| Player BS | 0% |
| Player BT | 0% |
| Player BU | 0% |
| Player BV | 0% |
| Player BW | 0% |
| Player BX | 0% |
| Other | 0% |
Market context
The MLB: Home Runs Leader prediction market currently prices this outcome at 97% YES. This market will resolve according to the player who records the most home runs during the 2026 Major League Baseball regular season. In the event of a tie, this market will resolve according to the …
Methodology
Sports-specific comparison page for MLB: Home Runs Leader. 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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