Chicago White Sox vs. Detroit Tigers

Platform comparison

Active sub-markets

Market context

The Chicago White Sox and Detroit Tigers have already played the June 20 game in Detroit, and the Tigers won 4-1, so a market showing **0% YES** after settlement is consistent with the result rather than live uncertainty.[1][2] For a comparator lens, that matters more on Polymarket-style venues than on traditional sportsbooks: prediction markets quote the event as a binary probability, while Betfair and Smarkets usually present *decimal odds* that imply the same outcome once translated, with the spread reflecting liquidity and fees rather than a separate view of the match.[1][2]

For historical framing, the main lesson is that baseball markets move sharply on line-ups, pitching confirmations, and whether a game actually goes ahead, but once a final official score is posted, the contract should be pinned to that result unless the event is postponed, cancelled, or ruled a tie under the rules.[1][2] That is where venue differences matter: Kalshi’s market price is built around an all-in exchange-style contract, while Betfair and Smarkets typically expose commission and, in some cases, regional KYC or access limits that affect who can trade and at what effective cost, even when the underlying game is identical.

The immediate catalyst for traders is no longer team news but settlement mechanics: official final statistics from MLB and any later score correction, postponement, or rescheduling notice would be the only plausible source of movement now.[1][2] ESPN and CBS Sports both have the Tigers’ 4-1 win recorded as final, which makes the practical comparison point whether a venue has already settled, is lagging on processing, or is still displaying stale probability despite the completed game.[1][2]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Chicago White Sox vs. Detroit Tigers specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). Kalshi Alternative UK routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Kalshi Alternative 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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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.

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.