Colorado Rockies vs. Arizona Diamondbacks

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Active sub-markets

Market context

Polymarket is pricing the Colorado Rockies at 34% to win tonight’s game against the Arizona Diamondbacks, with the contract settled in USDC on Polygon through conditional tokens. At that level, the market is giving Arizona a clear edge but not treating the result as close to certain, which matters because a single late scoring swing can move an MLB moneyline-style contract sharply in the final innings.

Recent form and head-to-head results point in the same direction. Arizona beat Colorado 2-1 on Thursday night on Corbin Carroll’s ninth-inning RBI single, extending its winning streak to five games. The clubs have also played to a generally Arizona-favoured recent record, with the Diamondbacks winning 14-8 in a June 2025 meeting and taking a strong overall edge across the matchup history tracked by public results sites.

For traders, the main catalysts are the confirmed line-ups, starting pitchers and any late injury or scratch news before first pitch at 9:40pm ET. Because the contract stays open until the game is officially completed, any postponement or suspended-game scenario could defer settlement, while a cancellation with no make-up would push it to a 50-50 outcome under the market rules. Recent AP and CBS Sports game coverage suggests Arizona’s offence has been producing late, which is relevant if the game stays tight into the back end.

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Methodology

This page reviews Colorado Rockies vs. Arizona Diamondbacks across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram 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.

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 it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.