Boston Red Sox vs. Kansas City Royals

Platform comparison

Active sub-markets

Market context

The Boston Red Sox beat the Kansas City Royals 3-1 on 18 May and then followed up with a 7-1 win, so the live market has already seen the underlying event swing decisively towards Boston. In comparable MLB markets, a 0% YES price usually reflects a completed game or a clear settlement edge rather than a genuine view on pre-game quality. For a market like this, the practical read is simple: once the official result is in the books, the remaining question is whether the market’s resolution source confirms the final score, postponed status, or any unusual outcome such as a tie or cancellation.

From a regulatory and access angle, prediction market participation can sit differently depending on where the user is located. German participants may face GlüStV restrictions because sports outcome wagering can fall within locally regulated gambling rules, while US users may find the platform’s CFTC perimeter relevant where event contracts are treated as derivatives rather than ordinary bets. The stated no-KYC up to $1,500 means a small user can usually fund and trade without enhanced identity checks, which improves accessibility for this specific market, but it does not change any local legal or tax obligations that may apply. Traders should still watch for MLB’s official game status, any schedule shifts, and the league’s final statistics feed, since those are what determine whether the market settles to Boston, Kansas City, or 50-50 in an abnormal end state.

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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

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.

FAQ

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 it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in 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.