Cleveland Guardians vs. Houston Astros

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Market context

The game between Cleveland and Houston is live from Daikin Park, and the market has already moved away from the pre-game pricing that favoured the Astros at around -135 to -136, while the crowd-implied probability sits at just 3% YES.[1][3] That gap matters because the exchange has effectively assigned a very low chance to a Guardians win, which implies traders are treating Houston as the stronger side despite Cleveland entering with the better overall record.[3]

Recent form offers a useful comparison point: ESPN lists Cleveland at 41-36 and Houston at 36-42, but StatMuse shows the Astros carrying the better recent five-game record, 3-2 versus Cleveland’s 2-3.[3][5] The series context also leans Houston, with StatMuse showing the Astros leading the current set 9-3 after two completed games, while the previous meeting between the clubs on 21 April finished as a Houston win.[5][4] That kind of split between season record and short-term performance is the main reason a low YES price can persist even when the standings look less one-sided.

For traders watching the final settlement path, the key catalysts are any late lineup or pitching changes, plus the on-field scoreline itself, because the market resolves only on the official result and stays open if the game is postponed.[2] MLB’s game preview highlights Slade Cecconi as a notable recent starter note for Cleveland and Yordan Alvarez as an in-form Houston bat, both of which can matter if a late adjustment changes the expected run environment.[8][6] The live odds context also shows Houston still priced as the favourite at roughly -135 on theScore, so any move away from that level would usually need a concrete team-news or in-game reason rather than background sentiment alone.[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

Where can I trade this market with the lowest fees?

On Prediction Today, 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.

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 Prediction Today?

Zero. Prediction Today 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, Prediction Today 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.