Chicago White Sox vs. Boston Red Sox

Platform comparison

Market context

Polymarket is pricing Chicago White Sox vs. Boston Red Sox at **45% YES** today, so the contract is trading below a coin flip on a White Sox win and is effectively a slightly anti-White Sox line on Polygon-settled USDC conditional tokens. The market resolves on the official final result, and if the game is postponed it stays open until completion; if it is cancelled with no make-up or ends tied, it settles 50-50.

That price sits in the middle of a short recent run that gives traders a useful read-through. Boston has already beaten Chicago in this same matchup multiple times in July, including 5-0 on 8 July and 8-1 on 7 July, and ESPN’s game log shows the Red Sox had won five straight at that point[8][13]. On the season tables available in the feed, the White Sox have had the stronger overall record, but Boston’s recent head-to-head form has been better, which helps explain why the contract is not priced much higher than the low-40s despite Chicago’s home advantage in prior meetings[2][11][12].

The main catalyst is the confirmed line-up and starting-pitching information before first pitch, because this is a same-day MLB contract and any late scratch can move the implied probability quickly. Traders also watch weather and any schedule change that could force a postponement, since that keeps the market open rather than triggering settlement; for context, the game sits in a cluster with another White Sox-Red Sox meeting listed later in the week, so game-specific news matters more than broader season form[2][4]. A recent ESPN/boxscore update also notes Boston’s strong recent stretch, with wins in 10 of 12 and 13 of 18 around this series, which is the sort of form flow the market has been discounting into the current price[8].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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 PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.