St. Louis Cardinals vs. Arizona Diamondbacks

Platform comparison

Market context

The Arizona Diamondbacks defeated the St. Louis Cardinals 8–7 in a walk-off victory on Sunday, 19 July 2026, at Chase Field, completing a dramatic rally from a seven-run deficit in the 10th inning [2]. This result confirms the game has already been played and settled, meaning the prediction market for this specific matchup is effectively closed to new trading activity despite its listed settlement window extending into 2026.

Historically, markets tied to completed MLB games with a definitive winner resolve immediately once official statistics are published, rendering a 0% probability for the losing side (Cardinals) the only logical outcome [2]. Comparable cases in on-chain sports markets show that conditional tokens for a finished event settle within hours of the final whistle, with USDC payouts distributed automatically on Polygon once the resolution source confirms the winner, leaving no room for the 50–50 tie clause to apply [1].

Traders should monitor the official MLB final statistics page for the 19 July game to confirm the resolution source has locked the outcome, as any delay in data ingestion could temporarily keep the contract open despite the result being known [1]. No further catalysts exist for this market, as the probable pitchers Andre Pallante and Eduardo Rodriguez have already completed their starts, and the series is concluded as Game 3 of 3 [1].

Sources: 1 · 2 · 3

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, 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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. 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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.