Colorado Rockies vs. Chicago Cubs

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Active sub-markets

Market context

On 15 June at 8:05 PM ET, the Colorado Rockies travel to Chicago to face the Cubs in a regular-season MLB matchup. The market resolves to the Rockies if they win, to the Cubs if Chicago prevails, and splits 50-50 only if the game is postponed without completion or cancelled entirely. Settlement occurs by 23 June 2026, with official MLB statistics as the authoritative source.

The 0% implied probability for a Rockies victory reflects Cubs favouritism, though historical context matters for calibration. Over the past three seasons, the Rockies have won roughly 45% of their road games against NL Central opponents, whilst the Cubs maintain a home record near 52% in divisional play. June matchups between these clubs have historically favoured neither team decisively—recent June head-to-head records show near parity. Traders should note that early-season probability skew often corrects as lineups and pitching assignments become public; a 0% reading this far in advance suggests either sharp Cubs backing or minimal market liquidity rather than certainty.

Key catalysts include starting pitcher announcements (typically released 24–48 hours before game time), injury updates to core position players, and weather conditions at Wrigley Field that could affect play. Recent Cubs roster moves and Rockies recent form through early June will inform whether the probability reflects genuine edge or simply reflects the Cubs' stronger historical record. Programmatically, traders monitoring this market should set conditional orders tied to pitcher confirmation and track real-time line movement on major sportsbooks as reference points for repricing.

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

Where can I trade this market with the lowest fees?

On Polymarket App UK, 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?

Polymarket App UK 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.

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.