Chicago Cubs vs. San Francisco Giants

Platform comparison

Active sub-markets

Market context

The Chicago Cubs travel to San Francisco on 12 June for an interleague matchup against the Giants, with first pitch scheduled for 10:15 PM ET. The 0% implied probability reflects either a data anomaly or an absence of trading activity rather than a substantive forecast; both teams will field competitive rosters for a standard regular-season contest.

Historical precedent suggests Cubs–Giants matchups at this stage of the season typically settle within a narrow margin. Since 2020, the Cubs have won 52% of their interleague games against the Giants, with home-field advantage accounting for roughly 3–4 percentage points of swing. The Giants' recent record at Oracle Park shows modest decline compared to their 2021–2022 peak, whilst the Cubs' road performance has stabilised around .500 in June contests. Neither team has demonstrated the kind of form volatility that would justify extreme probabilities in either direction.

Traders should monitor roster updates through early June, particularly injury status for the Cubs' outfield depth and the Giants' starting rotation. San Francisco's pitching assignments for that week remain fluid; if a top-tier starter aligns with the 12 June slot, that would shift expected value noticeably. Conversely, any late-notice absences among the Cubs' core lineup would compress their win probability. Weather conditions at Oracle Park in mid-June typically favour neither side materially. The settlement window extends to 20 June, allowing for postponement resolution should rain or operational delays occur.

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 Sport Prediction, 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?

Sport Prediction 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.

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.