San Francisco Giants vs. Arizona Diamondbacks

Platform comparison

Active sub-markets

Market context

The San Francisco Giants are due to play the Arizona Diamondbacks in a regular-season MLB game on 20 May, with the market settling on which side wins, or 50-50 only if the game is cancelled or ends tied. At a 0% crowd-implied YES price, the market is effectively at the far end of bearish sentiment on the Giants, despite the fact that baseball pricing is usually driven by starting pitcher confirmation, line-up strength, and late-breaking injury news rather than season records alone. Recent results also point to an Arizona edge: MLB.com’s scoreboard has the D-backs at 22-23 and the Giants at 20-27, and ESPN has highlighted Arizona wins over San Francisco, including a 6-3 result completed by Ketel Marte and Geraldo Perdomo, after a 12-2 opener in the same series.

For traders, the main catalysts are the official line-ups, any late pitching change, and whether the game is played as scheduled, since postponement keeps the market open until completion. Comparable MLB moneyline markets typically swing sharply once the starting pitchers are announced, and a low crowd price can also reflect that the Giants may be priced as underdogs in the underlying sports market. On access, this kind of contract sits within the broader regulatory split between Germany’s GlüStV regime, which can make gambling-linked access more restrictive, and the US CFTC’s commodity-style oversight framework, which is often cited for event contracts; “no-KYC up to $1,500” usually means a user can trade or withdraw up to that level before identity verification is triggered, but it does not remove local eligibility or licensing limits.

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Methodology

We track San Francisco Giants vs. Arizona Diamondbacks on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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.

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, PolyGram 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.