Arizona Diamondbacks vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The Arizona Diamondbacks face the St. Louis Cardinals at Busch Stadium on 22 June 2026, with the game scheduled for 7:45pm ET. On Polymarket, this contract currently prices the Diamondbacks’ win at 14% YES, implying a heavy on-chain bias toward the Cardinals. The market settles in USDC on Polygon, using conditional tokens to allocate payouts strictly based on the official final statistics once the game concludes.

Historically, mid-season MLB games between these rivals often see the Cardinals favoured due to their superior offensive metrics: the Cardinals hold 87 home runs and a 0.402 slugging percentage versus the Diamondbacks’ 68 home runs and 0.384 slugging [2]. In comparable June matchups over the past three seasons, the Cardinals won 68% of games when playing at home, a trend that aligns with the current 14% implied probability for the Diamondbacks [4].

Traders should monitor the starting pitcher announcements released 24 hours before the game, as bullpen fatigue and weather dependencies at Busch Stadium can shift outcomes rapidly. Recent reports note the Diamondbacks’ Corbin Carroll is batting 0.238, while the Cardinals’ Ketel Marte leads with 0.249, suggesting a potential catalyst if Carroll faces a struggling Cardinals pitcher [1]. Any delay or postponement will keep the market open until completion, per the on-chain settlement rules.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Arizona Diamondbacks vs. St. Louis Cardinals on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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

Is this market available outside the US?

Polymarket Scam? 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.

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 it cost to trade on Polymarket Scam??

Zero. Polymarket Scam? 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.