Arizona Diamondbacks vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The Arizona Diamondbacks and St. Louis Cardinals face off at Busch Stadium on 23 June for a 7:45pm ET MLB clash, with the Diamondbacks currently priced at 0% YES on Polymarket. This conditional token contract, settled in USDC on the Polygon network, reflects a market that has already priced in the outcome before the final whistle, suggesting the underlying event is viewed as effectively decided by on-chain mechanics.

Historical precedents for such extreme pricing in MLB markets often stem from confirmed line-up collapses or late-injury announcements that render a team non-competitive, as seen when a starting pitcher is pulled pre-game due to a confirmed arm issue. In similar cases, the market resolves quickly to the favoured side once the official final statistics confirm the absence of key players, with the 50-50 tie clause rarely invoked unless the game is cancelled entirely.

Traders should monitor the official MLB roster updates and any late announcements regarding Eduardo Rodriguez’s availability, given his recent 7-frame, 1-run performance, alongside the confirmed status of the Cardinals’ bullpen. Recent coverage from ESPN notes Rodriguez’s strong form but highlights the dependency on his health for the Diamondbacks’ chances, while CBS Sports confirms the game is live at Busch Stadium, making any delay or cancellation the primary catalyst for a potential market shift.

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Methodology

This page reviews Arizona Diamondbacks vs. St. Louis Cardinals 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 Polymarket Legit? — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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 Legit?, 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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Legit? 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.