Arizona Diamondbacks vs. San Francisco Giants

Platform comparison

Active sub-markets

Market context

The Diamondbacks travel to San Francisco on 27 May for an afternoon fixture against the Giants, with Polymarket pricing Arizona's victory at 53% on USDC settlement across Polygon conditional tokens. This represents a modest favourite status, reflecting the teams' competitive positioning roughly one month into the regular season. First pitch comes at 3:45PM ET, with the settlement window extending to 3 June to accommodate any postponements.

Arizona enters May having established itself as a playoff contender in recent seasons, whilst San Francisco has experienced more volatility in recent campaigns. The Giants' home-field advantage at Oracle Park historically provides marginal benefit, though neither team commands a decisive edge in head-to-head records that would substantially shift the probability away from near-parity. Recent performance trajectories matter considerably here—teams in winning streaks tend to see their win probabilities rise sharply, whilst injury reports or bullpen fatigue can shift market pricing meaningfully within days of fixture dates.

Traders should monitor roster updates through late May, particularly any announcements regarding starting pitcher assignments or key position-player availability. Weather conditions at the Bay Area venue occasionally affect afternoon games, with strong winds capable of influencing scoring patterns. The Giants' recent form and any trades or call-ups from their minor-league system could prompt repricing in the final week before play. Settlement follows official MLB final statistics, with the market remaining open should postponement occur, though cancellation or ties would resolve 50-50 across all positions.

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 Polymarket UK, which mirrors the Polymarket order book directly.

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.

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 Polymarket UK?

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

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.