New York Mets vs. Chicago White Sox

Platform comparison

Market context

The New York Mets are playing the Chicago White Sox at Rate Field, with the game scheduled for 22 August 2026 at 7:10 p.m. ET; in this market, a YES share pays out if the Mets win, while a NO share pays out if the White Sox win, and a cancelled or tied game would settle 50-50. The crowd price of 70% YES therefore implies the Mets are seen as the more likely winner, but not overwhelmingly so.

That reading fits the broader shape of the matchup. On the day of the game, the Mets were 58-71, fifth in the NL East, while the White Sox were 67-61 and top of the AL Central, so the market is not simply backing the better record; it is pricing the specific head-to-head spot, venue, and likely pitching context[1][4]. The teams also entered after a Friday meeting in which Chicago beat New York 6-4, which may have nudged sentiment towards the White Sox slightly despite the Mets still being the side the market favoured[5][12].

Traders should watch for any postponement or weather delay, because this market stays open until the game is completed if the scheduled match is washed out. Line-up confirmations, late pitcher changes, and any rescheduling within the three-game series matter as well, since the White Sox had Sunday and then a home series against Texas, while the Mets’ schedule remained tight around the weekend trip[3][14][15].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews New York Mets vs. Chicago White Sox across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Market UK, which mirrors the Polymarket order book at 0% fees.

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.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Market UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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%.