Colorado Rockies vs. Arizona Diamondbacks

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Active sub-markets

Market context

Polymarket’s contract on the Colorado Rockies v Arizona Diamondbacks is pricing the Rockies at 34% to win, with the event settled in USDC on Polygon via conditional tokens. That puts Arizona as the clear favourite, but not an overwhelming one, which is consistent with a divisional matchup where one upset can still move the market sharply before first pitch. For users, the key point is that the contract only resolves on the official final result: a win for Colorado pays out the Rockies side, an Arizona win pays out the Diamondbacks side, and any postponement keeps it open until the game is completed.

The recent form and head-to-head record both lean Arizona. The Diamondbacks beat Colorado 2-1 on Thursday night, with Corbin Carroll driving in the winning run in the ninth inning, extending Arizona’s winning streak to five games. More broadly, Arizona has had the better of this matchup over time, winning 160 of the meetings cited in the available head-to-head data, compared with Colorado’s 137. That history does not decide a single-game market, but it does help explain why the Rockies are still trading as the outsider even before line-up confirmation.

Traders should watch the final line-ups, starting pitcher announcements, and any late injury or weather updates, because those are the main short-term drivers of price moves in a same-day MLB market. The listed start is 9:40pm ET, so any delay or postponement matters directly to settlement timing under Polymarket’s rules. The relevant recent source is the Associated Press recap of Thursday’s 2-1 Arizona win, which confirms the current form line and the late-game edge that is likely feeding into the contract price.

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Methodology

This page is a comparison snapshot: one live quote (Polymarket), 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

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

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.

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 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.