Athletics vs. Arizona Diamondbacks

Platform comparison

Market context

The Athletics defeated the Arizona Diamondbacks 5–2 on Monday night in Phoenix, with Jeff McNeil delivering a pinch-hit single in the seventh inning to secure the go-ahead runs [1][4]. The game concluded on 20 July 2026, meaning the underlying event has already finished, which explains the 100% YES crowd-implied probability for the Athletics winning this prediction market contract [1][2].

On Polymarket, this contract trades as a settled outcome rather than a live wager, with USDC payouts locked on Polygon via conditional tokens that now reflect the confirmed final score [2]. Historically, markets where the event has already concluded resolve instantly once the official statistics are recognised by MLB, eliminating further price volatility; comparable cases from the 2025 season show similar contracts snapping to 100% within minutes of the final out [1].

Traders should monitor the official MLB final statistics page for any rare post-game adjustments, though no such changes are expected given the clear 5–2 result [4]. The settlement window ending 2026-07-28 provides ample time for the governing body to confirm the outcome, but with the game already complete, the primary catalyst is simply the formalisation of the result on the platform’s resolution source [1][5]. No further announcements or schedule dependencies remain relevant.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Athletics vs. Arizona Diamondbacks across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 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.

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.