Colorado Rockies vs. St. Louis Cardinals

Platform comparison

Market context

Colorado Rockies vs St. Louis Cardinals is trading at **91% YES** on Polymarket, which means the crowd is heavily leaning towards the Cardinals in this USDC-settled, Polygon-based contract. On-chain, that price reflects a market that already expects the official result to be St. Louis, with conditional tokens likely concentrated accordingly rather than a true coin-flip. The setup is consistent with the live and final game state reported by ESPN: the Cardinals beat the Rockies 3-2 on 7 August, and the same matchup was still shown as underway on 8 August before settling into a St. Louis lead in the available score feed.[1][8]

Recent head-to-head and form data explain why traders are not demanding a larger risk premium. St. Louis had a stronger season record and home mark than Colorado, and the Cardinals also took the first game of this series 3-2, with AP noting Iván Herrera’s solo homer and a five-inning outing from Kyle Leahy in the win.[1][2] The Rockies’ road record was materially weaker than St. Louis’ home record, while historical matchup data also favoured the Cardinals overall, so a 91% print is more a confirmation of a baseline edge than a sign of unresolved uncertainty.[2][6][15]

For traders, the main catalysts are the final official MLB result, any schedule changes, and whether the game is completed rather than postponed or wiped out. This contract does not need a subjective judgement on performance; it resolves mechanically from the recognised final statistics, with a cancellation or tie leading to a 50-50 outcome under the market rules. In practice, the key watch-items are lineup confirmations, weather or delay notices, and any MLB rescheduling bulletin, because those are the events that can shift a seemingly near-certain price back towards deadline risk.

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 PolyGram, 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

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'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.

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.