San Francisco Giants vs. Chicago Cubs

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Market context

The Giants travel to Chicago for a midweek matchup on 7 June, with the Cubs currently favoured at 53 per cent implied probability. Recent movement has favoured the home side following the Cubs' three-game winning streak through early June, whilst San Francisco has alternated wins and losses over the same period. Weather conditions at Wrigley Field are expected to be clear with temperatures around 22°C, eliminating rain as a settlement variable.

Historical matchups between these franchises show Cubs have won 52 per cent of regular-season contests over the past five seasons, though the Giants perform marginally better in June specifically (54 per cent win rate). The 47 per cent probability assigned to San Francisco reflects modest underdog status rather than severe disadvantage—comparable to teams with winning records facing division rivals on the road.

Pitching assignments will be the primary mover before first pitch. The Cubs have not yet confirmed their starter as of early June, though they typically deploy stronger rotation arms against western conference opponents. San Francisco's rotation depth has been tested by injuries; if they deploy a bullpen game or spot starter, that would likely shift the probability further toward Chicago. Traders should monitor official lineups released approximately 24 hours before game time, as starting pitcher quality historically accounts for 3–5 percentage points of movement in these markets.

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 Prediction Today, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Today, 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.

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 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.