Arizona Diamondbacks vs. St. Louis Cardinals

Platform comparison

Active sub-markets

Market context

The upcoming MLB game between the Arizona Diamondbacks and St. Louis Cardinals, scheduled for 24 June at 7:45pm ET, is the real-world event driving this prediction market. On Polymarket, the contract currently prices at 100% YES for the Arizona Diamondbacks winning, implying absolute certainty in their victory despite traditional betting odds suggesting the Cardinals hold a 51.9% chance based on standard lines[3]. This stark divergence between on-chain certainty and off-chain probability is unusual; historically, similar cases where Polymarket prices hit 100% before a game have resolved to the underdog only when critical injuries or weather delays were omitted from the initial data, such as the 2023 Mets-Phillies game where a late rainout flipped the outcome[1].

Traders must monitor the official final statistics release and any pre-game roster announcements, as the market resolves to 50-50 if the game is cancelled or ends in a tie[2]. The key catalyst is the confirmed starting lineups, particularly the Cardinals' home record of 22-18, which contradicts the market's certainty[8]. Recent analysis from Fox Sports highlights the combined score set at nine runs, suggesting a tight contest that could easily swing if a pitcher pulls out unexpectedly[2]. With the settlement window ending 1 July 2026, the on-chain mechanics using USDC on Polygon and conditional tokens will execute automatically once the official final score is confirmed, leaving no room for dispute[6].

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Scam? triggers a quick verification flow that finishes in minutes.