San Francisco Giants vs. Arizona Diamondbacks

Platform comparison

Active sub-markets

Market context

The Giants host the Diamondbacks on Wednesday evening, with the market currently implying a slight Arizona edge at 57% for a Diamondbacks win. That sits close to a coin flip rather than a strong directional call, which is broadly in line with the recent head-to-head record: Arizona are 10-10 across the last 20 meetings, while San Francisco have taken the longer historical edge overall. The most recent game in the series was a 12-2 Diamondbacks win on Monday, so the current price is not treating that result as decisive enough to move the game out of competitive territory.

The main short-term read-through is pitching and recent form. MLB’s game preview notes Justin Verlander has allowed one earned run in 13 innings across two starts this month, while Brandon Pfaadt is 0-4 with a 5.11 ERA in five career starts against the Giants. That creates a clear catalyst for live and pre-match pricing if either club changes its starter, and it also explains why analysts may be less comfortable than the market with a straightforward Arizona lean. Recent coverage from MLB and ESPN has focused on the Diamondbacks’ late-game offence, including Ketel Marte’s walk-off three-run homer in a 5-3 win over San Francisco, so trader attention should stay on confirmed line-ups, any bullpen usage from Monday’s game, and whether the announced starters hold.

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Methodology

This page reviews San Francisco Giants vs. Arizona Diamondbacks 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 PolyGram — 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 PolyGram, 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?

PolyGram 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 does it cost to trade on PolyGram?

Zero. PolyGram 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, 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.