Colorado Rockies vs. Arizona Diamondbacks

Platform comparison

Active sub-markets

Market context

The Colorado Rockies and Arizona Diamondbacks are scheduled to meet in Phoenix on 22 May, with the market currently pricing Arizona at about 66% and the Rockies at 34%. That split sits close to the broader pre-match range seen across recent previews, with Lines.com noting Arizona around 71% and OddsIndex implying roughly 63% for the Diamondbacks. In practice, this kind of ticket often sees the book widen or tighten on where new deposits arrive: smaller entry sizes via card or Klarna can create choppier early moves, while faster on-ramp flows through SEPA or USDC usually show up more quickly in depth and tighter spreads.

Recent comparable spots have leaned towards Arizona, largely because home-field advantage and bullpen quality have favoured the Diamondbacks in a series context. OddsIndex highlighted Arizona’s bullpen ERA at 3.49 against Colorado’s 4.72, which helps explain why the market has been willing to keep the Rockies as a live but clear underdog rather than price this as close to even. On markets like this, the main question is not just who is better on paper, but whether enough fresh capital can get in before liquidity thins; withdrawal friction and payment cut-offs often matter more on short-dated MLB games than on longer-horizon events.

Traders should watch the official starting line-ups, late pitching news and any weather-related delay risk, because those are the main catalysts for price moves before first pitch. If there is a postponement, the market stays open until the game is completed, so settlement depends on the rescheduled fixture rather than the original start time. With the settlement window running to 30 May, the decisive flow will likely come from pre-game deposits and any fast settlement rails that let participants rotate funds in and out without waiting on card refunds or slower bank transfers.

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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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.