San Francisco Giants vs. Cleveland Guardians

Platform comparison

Market context

Polymarket is pricing this game at just 2% YES on the Giants, which implies the contract is heavily skewed towards Cleveland on the on-chain order book for the USDC-settled conditional token position on Polygon. With the market still open until the settlement window closes on 25 August, that low quote reflects the combination of team strength, home field at Progressive Field, and the fact that the contract only pays out on the official final result, with postponements staying live and any cancellation or tie resolving 50-50.

The underlying form also leans against San Francisco. Cleveland entered the series with a better record and a home-moneyline price around the short-odds range, while San Francisco was sitting well below .500 and had dropped multiple recent games. In comparable MLB markets, sub-5% prices usually indicate a trader consensus that the underdog needs a meaningful information shock — a lineup surprise, pitching change, or late weather delay — rather than just normal variance to justify any move.

For a Polymarket user, the main catalysts are practical rather than abstract: confirmed line-ups, starting pitcher confirmations, and whether the game is completed on schedule in Cleveland. The listing shows the matchup as the first game of a series, so any postponement or split-schedule adjustment can matter more than usual for timing, but it does not change the eventual source of truth: the official final statistics. Recent previews put Cleveland as the clear favourite, so any price drift towards the Giants would likely need a credible team-news update rather than broad market sentiment.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track San Francisco Giants vs. Cleveland Guardians across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.