Colorado Rockies vs. St. Louis Cardinals

Platform comparison

Market context

The Colorado Rockies and St. Louis Cardinals meet again in St. Louis, with the market’s 74% YES price implying a clear Cardinals edge. That sits broadly in line with the sportsbook signal in the feed, where ESPN listed St. Louis at **-153** on 8 August, and with recent form: the Cardinals won **3-2** on 7 August and have been closer to .500 overall, while Colorado has remained well below it[12][1][2].

Historical match-up data also favours St. Louis, which has a long head-to-head advantage over Colorado and, according to CBS Sports’ game recap, had gone **49-19 at Busch Stadium III** against the Rockies before the latest result[8][17]. Comparable recent meetings have tended to be decided by narrow margins, though the Cardinals’ home record in this fixture suggests the market’s price is being driven more by venue and season-long quality than by any expectation of a blowout[17][8].

For traders, the main catalysts are lineup confirmation, starting-pitcher announcements, and any late injury or rest news before first pitch. Pre-game form has also been decisive: AP noted Colorado had been outscored over its recent stretch, while St. Louis had produced a better run prevention profile, and both sides entered with recent series results that still moved their public perception in opposite directions[3][14]. Because this contract settles on the official final result and stays open if the game is postponed, any schedule change or make-up decision would matter more than normal late-market noise[12].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi vs Polymarket, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi vs Polymarket. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 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 Kalshi vs Polymarket trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.