Cleveland Guardians vs. Houston Astros

Platform comparison

Active sub-markets

Market context

The Cleveland Guardians travel to Houston to face the Houston Astros on Saturday, 20 June 2026, at Daikin Park for a 7:15 PM ET start, with the Astros listed as clear favourites in traditional moneyline markets. On Polymarket, this contract currently prices the Guardians at a mere 2% chance to win, a stark divergence from the roughly 40% implied by DraftKings and Bet365 odds, suggesting the on-chain market has absorbed negative sentiment not yet fully reflected in standard sportsbooks.

Historically, such extreme underpricing of a team with a 39–35 record against a 36–41 opponent often signals a conditional token market reacting to a specific injury or pitching dependency rather than pure form. Comparable cases in MLB prediction markets show that when a team like the Guardians, who are 19–17 away, faces a probable starter like Spencer Arrighetti, the conditional tokens on Polygon can collapse the probability if the market anticipates a bullpen mismatch, even if the raw win probability remains higher.

Traders must monitor the official probable pitching announcements for Joey Cantillo and Arrighetti, as a late change could invalidate the current 2% pricing. Recent coverage from SportsGrid highlights Arrighetti’s recent ERA volatility and Cantillo’s ground-ball tendency, which are critical dependencies for the over/under 8.5 runs line and the win probability. Any delay in the game or a confirmed pitching swap before the 2026-06-27 settlement window will directly impact the USDC liquidity and the final resolution of this conditional token.

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 Polymarket Legit?, 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 Polymarket Legit??

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

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, Polymarket Legit? triggers a quick verification flow that finishes in minutes.