San Francisco Giants vs. Miami Marlins

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Active sub-markets

Market context

The San Francisco Giants face the Miami Marlins in the second game of a back-to-back after Miami edged the Giants 4-3 on Friday night, so the market’s **88% YES** implies a heavy favourite price on San Francisco despite the immediate head-to-head loss.[1] That kind of number usually reflects broader team strength rather than one-off results, but it also means the market is already pricing in most of the obvious Giants edge; the value case, if any, is more likely to sit with Miami as the shorter-term contrarian angle rather than with San Francisco at a compressed price.[1][2]

The historical frame is mixed but still tilts towards the Giants. San Francisco leads the all-time head-to-head 131-111, and the clubs have split this season’s meetings with the Giants holding a 2-1 edge in the 2026 series despite Miami’s recent win.[2] That combination matters for handicapping: the consensus can lean on the Giants’ wider matchup record, while the Marlins can point to recent form and the fact that they have already shown they can win this series, which is the sort of setup that can keep an underdog live even when the market is strongly one-sided.[1][2][8]

For traders, the main catalysts are confirmation of the starting pitchers, lineup rest after Friday’s game, and any late injury or bullpen availability news, because those are the factors most likely to justify whether 88% is fair or overstated. The market window only resolves on the official final result, and because this is a same-series rematch, any change in scheduled pitching or a late scratch would matter more than the completed game from the night before.[1]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

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 it cost to trade on Who Will Win?

Zero. Who Will Win routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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, Who Will Win 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.