Atlanta Braves vs. Boston Red Sox

Platform comparison

Active sub-markets

Market context

The Braves and Red Sox meet on 26 May at 6:45 PM ET in what Polymarket currently prices at 53% implied probability for Atlanta, with USDC settlement on Polygon conditional tokens reflecting modest confidence in the home team. Atlanta enters as the favourite despite playing in Boston, suggesting the market weights roster composition and recent form more heavily than venue advantage.

Atlanta's recent record against AL East opponents provides the historical anchor for this pricing. The Braves have won 58% of their matchups against Boston over the past three seasons, though Red Sox performance varies considerably year-to-year. The 53% probability sits near the midpoint of typical home-field advantage (roughly 54% across MLB), indicating traders view this as a relatively balanced fixture rather than a decisive mismatch. Comparable May contests between these franchises have settled within a 48–55% range for the visiting team, suggesting the current price reflects standard expectations rather than exceptional circumstances.

Traders should monitor pitching assignments and injury reports through 26 May, as starting pitcher quality typically shifts probabilities by 3–5 percentage points in either direction. Recent roster moves, particularly any trades or call-ups announced in the preceding week, could alter the conditional token distribution on-chain. Weather conditions at Fenway—wind direction and temperature—occasionally influence totals markets but rarely shift moneyline probabilities beyond 1–2 points. The settlement window extends to 2 June, allowing for postponement resolution if weather forces a reschedule.

Methodology

We track Atlanta Braves vs. Boston Red Sox on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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 Kalshi 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?

Kalshi 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.

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.