Kansas City Royals vs. Chicago White Sox

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Active sub-markets

Market context

The upcoming MLB fixture sees the Kansas City Royals travel to Chicago to face the White Sox at Rate Field on 27 June, with the game scheduled to commence at 4:10 PM ET. This prediction market resolves to the Royals if they secure the win, while a White Sox victory triggers the opposite outcome. Current crowd-implied probability sits at 0% for the Royals, suggesting the market heavily favours the home side despite the Royals’ recent form.

Historically, zero-percentage probabilities in MLB markets often precede games where a team is missing a key starter or suffering from a significant injury, mirroring cases where odds collapsed after late roster announcements. In comparable scenarios, such as when a top pitcher is pulled from the rotation, conditional order bots typically adjust exposure within minutes, whereas manual traders lag. The 0% figure here likely reflects a known dependency, such as Meidroth’s four-hit game boosting White Sox confidence, which programmatically skews the implied win rate before the first pitch [2].

Traders must monitor real-time roster updates and weather dependencies, as a single rain delay or pitching change could invalidate the current 0% assessment. Recent previews highlight that the White Sox must win by two runs to cover the run line, adding a layer of complexity for those using copy-trading strategies focused on margin outcomes [1]. FanDuel’s odds show the Royals as +3.5 favourites, indicating a potential divergence between betting markets and prediction markets that algorithmic arbitrage bots could exploit [6]. Any postponement will keep the market open, but a cancellation or tie resolves it at 50-50, a critical dependency for risk-managed conditional orders.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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?

On Polymarket App 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?

Polymarket App 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.

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 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.

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.