MLB All-Star Game

Platform comparison

Market context

The American League and National League face off tonight at Citizens Bank Park in Philadelphia for the 96th MLB All-Star Game, a fixture celebrating the 250th anniversary of the Declaration of Independence [10][11]. In prediction markets, a YES share on the American League winning costs roughly £0.46 today, reflecting a 46% crowd-implied chance of victory, while a NO share bets against that outcome. If the game ends in a tie or is cancelled without a make-up, the market resolves 50-50, but a tie after nine innings now triggers a sudden-death “swing-off” rather than a draw [12].

Historically, the National League has held a slight edge in recent years, winning the last two All-Star Games and currently favoured by traditional sportsbooks at -130 to -142 moneyline [1][9]. Prediction markets align with this trend: Kalshi prices the NL at 59% implied probability, while Polymarket shows similar favouritism, suggesting the 46% AL price here may offer value if the American League’s pitching depth or Ohtani’s NL presence shifts momentum [3][4]. The gap between book odds and prediction-market pricing often narrows as game time approaches, making early discrepancies worth monitoring.

Traders should watch final roster confirmations and the Phase 2 voting update closing Thursday noon ET, which could alter starting line-ups and impact run-scoring potential [2]. Key catalysts include the official starting pitchers announced pre-game and any weather delays at Citizens Bank Park, as the game total is set at 7.5 runs with experts leaning “Over” [1][5]. Since the settlement window extends to 22 July 2026, postponed games will keep the market open until completion, so real-time updates on Fox’s broadcast and MLB’s official stats will drive final resolution [10].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track MLB All-Star Game 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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Market UK. 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.