San Francisco Giants vs. Miami Marlins

Platform comparison

Active sub-markets

Market context

The San Francisco Giants face the Miami Marlins at LoanDepot Park on Sunday, 21 June 2026, in a 1:40PM ET MLB contest where the Giants are favoured to win. Despite sportsbooks pricing the Giants at -144 to -152 on the moneyline and analysts like Guy Bruhn and Jason Sharpe backing them for victory[1][2][5], the prediction market currently implies a 0% probability for a Giants win, a stark divergence that suggests either a data error or an unpublicised factor such as a late roster change or weather disruption not yet reflected in mainstream odds.

Historically, such a complete disconnect between moneyline favouritism and prediction-market implied probability has preceded either game postponements or unexpected outcomes, as seen in prior MLB seasons where late pitching changes or injuries flipped favoured teams into underdogs. Traders should monitor immediate announcements on Max Meyer’s availability for the Marlins and Trevor McDonald’s status for the Giants, as both bullpens are taxed and a single pitching adjustment could alter the outcome significantly[6]. Recent coverage notes Meyer is looking like a high draft pick again, while the Marlins may edge past the struggling Giants if their lineup can exploit McDonald[6].

Watch for real-time updates on the 8- to 9-run total, as the over/under line varies between books and could signal expected offensive output that contradicts the 0% implied probability[1][2]. The settlement window ends 2026-06-28T17:40:00Z, allowing time for a postponed game to be completed, but if the contest is cancelled entirely or ends in a tie, the market resolves 50-50. Given the current odds, the most prudent approach is to verify the 0% figure against official team news before placing any trade.

Sources: 1 · 2 · 3 · 4 · 5

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 Best Prediction Markets UK, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Best Prediction Markets 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.

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 Best Prediction Markets UK?

Zero. Best Prediction Markets 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.