Houston Astros vs. San Francisco Giants

Platform comparison

Market context

The Houston Astros face the San Francisco Giants on 10 August at 9:45PM ET in what Polymarket currently prices at 59% probability of an Astros victory. This reflects the conditional token structure on Polygon, where YES holders gain USDC exposure to an Astros win whilst NO holders benefit from a Giants outcome. The settlement window extends to 18 August 2026, allowing for postponement contingencies typical of mid-summer baseball scheduling.

Historical matchups between these franchises show the Astros have maintained competitive advantage in recent seasons, though the Giants' performance varies considerably based on roster health and pitching availability. The 59% implied probability sits above the Astros' typical win rate against sub-.500 opponents but below their performance against division rivals, suggesting the market has calibrated for the Giants' current standing and recent form. Context matters here: the Astros' offensive consistency and bullpen depth have historically supported stronger probabilities in similar August fixtures.

Traders should monitor starting pitcher assignments and any late roster moves announced within 48 hours of game time, as these directly influence conditional token valuations. Weather conditions at the venue and any injury updates to key position players will shift the probability distribution. Recent performance streaks—whether either team enters on a winning or losing run—typically correlate with modest probability shifts in these markets. The USDC settlement mechanism means traders should confirm final official MLB statistics match Polymarket's resolution source before expiry.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.