Colorado Rockies vs. San Francisco Giants

Platform comparison

Market context

The Colorado Rockies face the San Francisco Giants at Oracle Park on 9 July, with the crowd pricing a Rockies win at 35% despite their 38–56 season record and a 16–31 away mark. Historically, Colorado is 5–13 straight-up in their last 18 meetings with San Francisco, a trend that aligns with the current implied probability and suggests the market is correctly weighting the Giants’ home advantage [8]. Ryan Feltner, Rockies’ pitcher, has beaten the Giants twice this season with two earned runs over 12 innings and 11 strikeouts, offering a narrow counter-narrative that could shift odds if he starts [6].

Traders should monitor the official starting pitcher announcement and any late-injury updates before the 9:45pm ET gate, as Feltner’s recent success against this opponent is a key dependency for a Rockies upset. The game is scheduled for Oracle Park, where the Giants hold a 19–24 home record, reinforcing the 65% implied probability for a Giants win [2]. If the game is postponed, the market remains open until completion; if canceled without a make-up or ending in a tie, it resolves 50–50, a clause that matters for conditional-order strategies. Programmatic approaches would track MLB.com’s live roster feed and adjust position sizes based on real-time pitcher confirmations, treating the 35% YES as a baseline to test against Feltner’s matchup history.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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.

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.

Do I need to KYC for this market?

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