San Francisco Giants vs. Colorado Rockies

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Active sub-markets

Market context

The San Francisco Giants travel to Colorado on 31 May for an afternoon fixture against the Rockies, with first pitch at 3:10 PM ET. Polymarket currently prices a Giants victory at 79%, reflecting the conditional token structure on Polygon where USDC backs both YES and NO positions. The settlement window extends to 7 June at 19:10 UTC, allowing for postponements within that window; any cancellation without a make-up game triggers a 50-50 split resolution.

The Giants' recent form and roster depth typically favour them in matchups against the Rockies, a franchise that has struggled to maintain consistency. Historical head-to-head records show San Francisco winning roughly 55–60% of regular-season encounters over the past five seasons, though Coors Field introduces variables that compress traditional advantages. The 79% probability reflects this structural edge but also prices in the inherent volatility of single-game outcomes where pitching matchups and weather conditions can shift expected value considerably.

Traders monitoring this contract should track starting pitcher announcements, which typically come 24–48 hours before game time. Altitude effects at Coors Field—where the ball carries further and humidity is lower—historically favour hitters and can narrow the Giants' edge if their pitching assignment skews towards high-ERA relievers. Injury reports released through MLB's official channels in the days preceding 31 May will also influence conditional token valuations, particularly any late roster changes affecting either side's offensive depth or bullpen availability.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket UK, 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.

Is this market available outside the US?

Polymarket 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.

What does it cost to trade on Polymarket UK?

Zero. Polymarket UK 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, Polymarket UK 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.