Arizona Diamondbacks vs. St. Louis Cardinals

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Active sub-markets

Market context

The upcoming MLB contest between the Arizona Diamondbacks and St. Louis Cardinals, scheduled for 7:45PM ET on 24 June, is the real-world event driving this prediction market. The game takes place at the Cardinals’ home venue, with both teams in mid-season form: the Diamondbacks sit at 40–39 in the NL West, while the Cardinals hold a 42–35 record. Betting lines set the total runs at nine, with the over priced at -112 and the under at -108, reflecting expectations of a moderate offensive output[1][3].

Historically, crowd-implied probabilities of 100% in single-game MLB markets are rare and often signal either a mispriced book or a pre-settlement error, as even dominant teams face non-trivial upset risks. Comparable cases from 2024–2025 show that such extreme odds typically resolve to 50–50 when games end in ties or are cancelled, but more often correct to 57–63% favouring the perceived winner once live data enters the market[1][4]. The current 100% YES reading for the Diamondbacks contradicts numberFire’s 57.5% win probability for the Cardinals, suggesting a potential liquidity or on-ramp friction issue in the book’s depth[1].

Traders should monitor the official final statistics release post-game, as delays in Klarna or SEPA deposit confirmations can stall funding flows that sustain book depth. A key catalyst is the 24 June game start time; any postponement extends the settlement window, while cancellation triggers a 50–50 resolution. Recent coverage from FanDuel highlights the Cardinals’ slight edge in win probability, reinforcing the need to watch for announcement updates on pitching rotations or weather dependencies that could shift odds before settlement[1][9]. Withdrawal rails via USDC or Klarna may also impact trader participation if fees rise during peak settlement hours.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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

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.

What does it cost to trade on Polymarket Klarna UK?

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

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.