Cleveland Guardians vs. Houston Astros

Platform comparison

Active sub-markets

Market context

The underlying event is a single MLB game in Houston between the Cleveland Guardians and Houston Astros, and this market pays out **YES** if Cleveland wins and **NO** if Houston wins. For newcomers, a YES share is simply a contract that settles to 1 if the stated outcome happens and 0 if it does not; here, the price also has to reflect edge cases in the rules, because a postponement keeps the market open, while a cancellation with no make-up game, or a tie, resolves 50-50.

A 97% crowd-implied probability signals that traders think Cleveland is very likely to win, but it is still not certainty. That reading makes most sense when you compare it with the kind of baseball volatility that can turn on one starter, one bullpen stretch, or a late scoring chance. Current previews for this matchup describe Houston as the shorter-priced side in some markets, while Cleveland’s recent form has been mixed rather than dominant, including a 4-6 run over its last ten games and a season profile built on relatively modest run production.[2][3][4]

For traders, the main catalysts are whether the game starts on time, whether either club changes its pitching plan, and whether any weather or schedule announcement affects completion before the settlement window closes on 2026-06-27T00:10:00Z. MLB’s official game preview and live game pages are the key sources if the contest is delayed, suspended, or completed after first pitch, because this market stays open until the final result is official.[5][6][8] In practical terms, the probability can move quickly if a late lineup change, pitching change, or postponement alters the expected winner.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Cleveland Guardians vs. Houston Astros across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Prediction Market UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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?

Prediction Market 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'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.

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.