San Francisco Giants vs. Miami Marlins

Platform comparison

Active sub-markets

Market context

Polymarket is pricing the San Francisco Giants at **81% YES** in USDC on Polygon, so the contract is already implying the Giants are strong favourites rather than merely slight leaners. For a user holding conditional tokens, the key point is that settlement follows the official result of the completed MLB game; if it is postponed, the market stays open, and if it is cancelled outright or ends in a tie, it settles 50-50.

That high probability sits above the moneyline picture that bookmakers have been showing, where the Giants have been listed around +120 and the Marlins around -138 on one June 20 board, with other previews giving Miami a narrow edge or near pick’em pricing.[1][2][3][9] In practical terms, that means Polymarket is assigning the Giants a materially better chance than the cash market consensus, so the current YES price is not just a mirror of the sportsbook line. The result is especially sensitive to late movement if the edge is driven by lineup confirmation rather than a permanent class gap.

For traders, the most important catalysts are the posted line-ups, any late pitching change, and whether the game starts on time, since postponement preserves the contract rather than forcing a settlement.[4][6] ESPN’s game listing shows the scheduled Giants-Marlins matchup and live odds feed, which is the kind of source that usually reflects last-minute roster and status updates before first pitch.[6] Because the market window does not close until after the expected finish time, any rain delay, scratch, or schedule shift can matter as much as pre-game form in the final minutes before resolution.

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). 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.

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.

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.