San Francisco Giants vs. Miami Marlins

Platform comparison

Active sub-markets

Market context

Polymarket has this Giants–Marlins contract at **39% YES** for San Francisco on the conditional-token market, so the crowd is pricing Miami as the clearer favourite but not by a wide margin. In practical terms, traders are locking USDC into a Polygon-based position that pays out according to the official game result, with the contract staying open if the fixture is postponed and only settling on a completed result or the market’s 50-50 fallback for a cancelation or tie.

That price sits below the main pre-game moneylines, which have the Giants around 1.65 and the Marlins around 2.12 at one listed sportsbook, while ESPN’s odds screen also showed San Francisco as a modest favourite at -115. Fox Sports’ boxscore listing confirms the game has already been scheduled for 1:40 PM local time on 21 June, which means the market is now more about execution risk than calendar risk. For Polymarket users, the useful read is that 39% implies a fairly sceptical view of San Francisco relative to the betting market, but not one that is detached from it.

The main catalysts are straightforward: the lineups, any late pitching change, and whether the game is completed without weather or logistical interruption. The market description matters here because a postponement keeps the contract open until the make-up game is played, while a cancelation with no make-up leaves traders in the 50-50 outcome bucket. That structure means the on-chain position is sensitive not just to who plays better, but to whether the scheduled game is actually finished under MLB’s official stats.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews San Francisco Giants vs. Miami Marlins across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Polymarket UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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?

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.

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.

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?

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.