Cleveland Guardians vs. Houston Astros

Platform comparison

Active sub-markets

Market context

The Cleveland Guardians and Houston Astros are due to meet in the regular season finale scheduled for 20 June at 7:15pm ET, with the market left open if the game is delayed and only settling on the completed result, or 50-50 if it is cancelled or ends tied. For a programmatic workflow, that means the right object to monitor is not just the listed start time but the official completion state, since postponements can push resolution beyond the nominal schedule.

A 2% crowd-implied yes price is far below what recent head-to-head context would suggest. Houston beat Cleveland 9-2 on 20 April, with Isaac Paredes homering twice and Christian Walker also going deep, and the teams have split a broader recent sample with Houston holding the better overall record in the series in several rolling datasets.[1][3][5] In practical trading terms, a low price like this usually reflects either stale sentiment, an error in the market’s event mapping, or an expectation that the outcome is already heavily discounted elsewhere rather than a true read on the game state.

The main catalysts to watch are lineup confirmation, pitching assignments, and any late schedule changes, because those inputs move both win probability and whether the market remains live. The posted matchup time is 23:15 UTC on 20 June, so an app or bot should check for official MLB status updates before execution, then reprice off confirmed starters and batting orders as soon as they land.[2] Recent game-state evidence also matters: ESPN’s 20 April recap shows Houston’s offence can swing the matchup quickly, which is useful when setting conditional orders around first-lineup news rather than waiting for open.[1]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Cleveland Guardians vs. Houston Astros on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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

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.

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 does it cost to trade on Polymarket App UK?

Zero. Polymarket App UK 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, Polymarket App UK 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.