Kansas City Royals vs. Detroit Tigers

Platform comparison

Market context

The Kansas City Royals are due to face the Detroit Tigers in a single MLB game, and this market pays out on the outright winner: a **YES** share means the Royals win, while **NO** means the Tigers win. If the game is postponed, the market stays open until it is completed; if it is cancelled with no make-up, or ends tied, it resolves 50-50 rather than to either side.

A current crowd-implied probability of **33% YES** suggests the market is treating Kansas City as the underdog, with Detroit priced as the more likely winner. That lines up with the live moneyline snapshot showing Detroit around **-225** and Kansas City around **+188**, which is roughly consistent with the Tigers being favoured by the bookmaker and the Royals needing a lower-probability outcome to cash a YES position.[1] For readers new to prediction markets, the share price is not a forecast of run margin; it is simply the market’s view of the chance of the named outcome, here a Royals victory.

For traders, the main catalysts are the official line-ups, starting pitcher confirmation, and any weather-related delay that could change whether the game is played on schedule. Late scratches or a pitching change can move both the sportsbook price and the prediction market because they alter the expected win probability before first pitch. Recent game coverage also shows these teams have already met in the same series this season, including a Royals win on 9 May, which is useful context but does not determine today’s settlement.[2]

Sources: 1 · 2

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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.

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.

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.