Boston Red Sox vs. Kansas City Royals

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Active sub-markets

Market context

Boston levelled the series with a 3-1 win in Kansas City on Monday, moving the clubs to 1-1 across the first two games and trimming the Red Sox’s gap in the AL Wild Card race. That result came after Boston had also taken the opener, so the recent form in this matchup has already tilted towards the visitors, even though the Royals still hold the stronger season-long position in the standings. The current 0% crowd-implied price on Boston looks to reflect the market’s reluctance to assign any chance before line-up, pitching and venue factors are fully digested, rather than a view that the Red Sox are out of contention.

For context, head-to-head records between evenly matched AL teams can swing quickly on a single starter announcement or bullpen availability. Boston’s back-to-back wins have already shown that the gap in the standings is not enough on its own to settle the game script, especially with the Red Sox closing in on the Royals in the wild-card picture. MLB.com noted after Monday’s game that Boston were 3-1 against Kansas City this season and could clinch the tiebreaker with one more win in the remaining meetings, which adds some relevance to the next result beyond the box score itself.

Traders should watch the confirmed starters, any late line-up rest, and whether either side manages pitching usage carefully after the first two games of the set. Kansas City’s home advantage still matters, but the immediate catalyst is likely to be the pitching matchup and how both clubs deploy their high-leverage relievers after a short turnaround. If there is any postponement risk or weather delay, the settlement window remains open until the game is completed, so official MLB status updates are the key dependency.

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Methodology

This page is a comparison snapshot: one live quote (Polymarket), 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

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 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?

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.