San Francisco Giants vs. Colorado Rockies

Platform comparison

Market context

The San Francisco Giants face the Colorado Rockies in Saturday’s 8:10 PM ET MLB clash at Coors Field, with the Giants currently priced at 78% YES on Polymarket to win the game. This on-chain contract, settled in USDC on Polygon via conditional tokens, reflects a market view that diverges sharply from predictive models, which assign the Giants only a 57.3% win probability [1].

Historically, such gaps between market-implied and model-derived probabilities in MLB games at Coors Field often signal overreactions to recent form rather than underlying strength. For instance, in July 2025, the Giants were similarly overpriced at 75% YES before losing to the Rockies in a 14–3 rout, mirroring the high-scoring trend seen in their July 3 matchup [3]. The Rockies’ starting pitcher, Sean Sullivan, carries an 8.64 ERA and a 0–2 record, while Giants pitcher Robbie Ray boasts a 3.39 ERA and a 7–6 record [1][8].

Traders should monitor bullpen usage announcements and weather updates for Coors Field, as dry, thin air there consistently boosts over/under totals—models predict a 57.1% chance the game exceeds 12 total runs [1]. Any late injury news to key hitters or starting pitchers could shift the conditional token liquidity, especially given the Rockies’ reliance on Sullivan after Tomoyuki Sugano’s scratch [8]. The settlement window closes on 2026-07-12, so all on-chain positions remain open until the game is officially completed.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track San Francisco Giants vs. Colorado Rockies 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

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?

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'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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.