Houston Astros vs. Kansas City Royals

Platform comparison

Active sub-markets

Market context

The Houston Astros face the Kansas City Royals on 14 June at 2:10pm ET in a regular-season MLB matchup. The settlement window extends to 21 June, accommodating potential postponements. The 0% implied probability currently shown in this market represents an extreme outlier against conventional sportsbook pricing, which typically reflects the Astros as favourites in most matchups against the Royals, with lines generally ranging between −110 and −130 depending on pitching assignments and venue.

Historical context reveals that the Astros have dominated this fixture in recent seasons, winning approximately 60% of games against Kansas City since 2020. However, prediction markets occasionally display zero probabilities due to technical constraints or liquidity limitations rather than genuine assessment of outcome likelihood. The Royals, despite their weaker record, have shown capacity to compete in individual games, particularly when facing Houston's bullpen late in contests. Comparable markets on identical matchups across major platforms typically show the Astros at 55–65% implied probability, suggesting meaningful divergence from this contract's current state.

Traders should monitor starting pitcher announcements, expected within 48 hours of the fixture. Recent roster moves or injury updates affecting either team's lineup could shift expectations materially. Weather conditions at Kauffman Stadium and any last-minute schedule adjustments warrant attention given the settlement window's extension clause. Cross-platform comparison with FiveThirtyEight's Elo ratings and major sportsbooks' closing lines will clarify whether this market's extreme reading reflects genuine information asymmetry or operational constraints.

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 Best Prediction Markets 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?

Best Prediction Markets 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.

What does it cost to trade on Best Prediction Markets UK?

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

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.