Cleveland Guardians vs. Philadelphia Phillies

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Active sub-markets

Market context

On 23 May at 4:05 PM ET, the Cleveland Guardians will face the Philadelphia Phillies in an MLB regular-season matchup. The market resolves to the Guardians if they win; to the Phillies if Philadelphia prevails. The settlement window closes 30 May at 20:05 UTC, allowing for postponements but resolving 50-50 if the game is cancelled without a make-up or ends tied. Current crowd-implied probability sits at 39% for a Guardians victory, reflecting modest confidence in Philadelphia's chances as the favoured side.

Historically, the Guardians have shown competitive form in recent seasons following their 2022 AL Central title, whilst the Phillies remain a National League contender with deeper postseason experience. Head-to-head records and recent form matter less in single-game markets than roster health and starting pitcher matchups. The 39% probability for Cleveland suggests the market is pricing in Philadelphia's slight edge, though single-game variance remains substantial—neither team's season record nor divisional standing guarantees outcome in a one-off contest.

From a regulatory standpoint, this market's accessibility depends on jurisdiction. Under German GlüStV provisions, prediction markets operating without full sports-betting licensing face restrictions on promotional reach. US CFTC oversight of binary sports contracts remains limited to certain designated contract markets, leaving most peer-to-peer platforms in a grey area. For UK-based traders, the £1,500 no-KYC threshold on some platforms applies per transaction or account tier; exceeding it typically triggers identity verification. Traders should verify their platform's compliance posture before wagering, as regulatory treatment of prediction markets continues evolving across major jurisdictions.

Methodology

We track Cleveland Guardians vs. Philadelphia Phillies 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

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

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?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in 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.