Colorado Rockies vs. Chicago Cubs

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Market context

On 15 June, the Colorado Rockies travel to Chicago to face the Cubs in an MLB regular-season fixture. A YES share in this market pays out if the Rockies win; a NO share pays out if the Cubs win. The 11% probability currently assigned to a Rockies victory reflects the Cubs' status as strong favourites in this matchup. The settlement window extends to 23 June to accommodate any postponements, with cancellations or ties resolving the market 50-50 across both outcomes.

The Cubs have historically dominated this fixture over recent seasons, winning roughly two-thirds of their head-to-head meetings since 2020. Colorado's home-field advantage has been minimal in away games at Wrigley Field, where the Cubs maintain a notably higher win percentage than their overall season record. The 11% implied probability sits below the Rockies' typical win rate in neutral matchups, suggesting the market is pricing in both the Cubs' recent form advantage and their superior roster depth at key positions.

Traders should monitor pitching assignments in the days preceding the game, as starting pitcher quality significantly influences outcomes in baseball. Recent injury reports from both camps matter considerably—the Cubs have managed roster depth better than Colorado this season, whilst the Rockies have faced notable absences in their outfield rotation. Weather conditions at Wrigley, particularly wind direction affecting fly-ball distances, can shift probabilities marginally. The Cubs' recent performance against left-handed pitchers and Colorado's bullpen reliability in high-leverage situations represent additional variables worth tracking before settlement.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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

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 Prediction Market UK?

Zero. Prediction Market UK 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.