Cincinnati Reds vs. St. Louis Cardinals

Platform comparison

Market context

Polymarket has this Reds–Cardinals contract at **45% YES** on the Cincinnati side, which means the market is still pricing St. Louis as the slightly likelier winner but not by much. Because the contract settles on the official result of the game, the key object here is the binary exposure in USDC on Polygon: a win for Cincinnati pays the YES side, a St. Louis win pays the NO side, and a cancellation or tie would push it to 50-50 under the market rules.

Recent head-to-head results lean towards St. Louis, which helps explain why Cincinnati is not priced as the favourite. The Cardinals beat the Reds 10-3 on 5 June, with Alec Burleson driving in runs and Lars Nootbaar contributing in his season debut, and they also followed that with a 5-3 rally win to sweep the series on 7 June.[1][2] For a Polymarket user, that kind of short-run matchup history matters less than season-long form, but it does frame why the market can sit below parity even when the teams are closely matched.

The main catalysts to watch are the official line-ups, starting pitcher confirmation, and any late changes to the schedule, because this market stays open if the game is postponed until it is completed. The listed start time is 2:15PM ET, so any weather delay, doubleheader adjustment, or scratch at pitcher could move the price quickly before first pitch; the settlement window also extends until 2026-08-02T18:15:00Z, which matters if the game is pushed back.

Sources: 1 · 2 · 3

Methodology

We track Cincinnati Reds vs. St. Louis Cardinals across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.