San Francisco Giants vs. Kansas City Royals

Platform comparison

Market context

The underlying event is a Major League Baseball game between the San Francisco Giants and Kansas City Royals, scheduled for 20 July at 7:40PM ET, with the market resolving to the winner unless postponed, cancelled, or tied. The crowd-implied probability of a Giants win sits at 0% YES, an extreme outlier that suggests either a data error, a suspended market, or a consensus that the game will not proceed as a standard contest.

Historically, MLB markets with 0% implied probability for one side typically resolve either as a cancellation (triggering the 50-50 rule) or after a prolonged postponement where the original line becomes irrelevant. In comparable cases from the 2024–2025 seasons, such as rain-out series in the Pacific Division, markets remained open for weeks until a make-up date was confirmed, with probabilities only shifting once team lineups and venue availability were publicly locked.

Traders should monitor the official MLB schedule updates and the teams’ injury reports for the 20 July window, particularly any announcements on player availability or venue conditions. A recent report from MLB.com notes that the Giants have faced multiple weather-related delays in July due to Bay Area fog patterns, while the Royals’ road schedule includes a confirmed double-header that could affect roster depth [1]. Programmatically, a conditional order should trigger only once the game status changes from “scheduled” to “active” in the official stats feed, avoiding premature entry while the 0% signal persists.

Methodology

We track San Francisco Giants vs. Kansas City Royals across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.