Cleveland Guardians vs. Philadelphia Phillies

Platform comparison

Active sub-markets

Market context

Polymarket is pricing the Cleveland Guardians at about 39% in USDC on Polygon, with the contract settled by the official result of Friday’s MLB game in Philadelphia. That implies the Phillies are a clear market favourite, but not a lock: Cleveland have gone 30-22 overall and 15-12 away, while Philadelphia sit at 25-25 and 13-14 at home. For users holding the YES side, the key is that the on-chain position only resolves when the game is officially complete; if it is postponed, the market stays open, and any cancellation or tie falls back to 50-50 under the rules.

The recent matchup context is mixed rather than one-sided. ESPN’s game page shows the clubs entering with similar run totals and batting averages, though Cleveland have a stronger record and better road form. Head-to-head results over the longer sample slightly favour Philadelphia, but not by enough to be decisive: AIScore lists the Phillies with 10 wins and the Guardians with 8 across 18 meetings since 2002. Recent series history also matters less than current form in a one-game contract, particularly when the settlement is binary and tied to the final official box score.

For traders, the main catalysts are the starting pitcher announcement, any late lineup scratches, and weather-related delay risk in Philadelphia. Pre-game pricing can move quickly if one side confirms a stronger arm or a rested bullpen, especially in a market with settlement dependent on the completed official game rather than first nine innings. ESPN and the club game pages are the most practical live references, while the earlier series opener, which Cleveland won, may shape sentiment but does not affect settlement unless it is followed by this game being played to a final result.

Sources: 1 · 2 · 3 · 4 · 5

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

Where can I trade this market with the lowest fees?

On PolyGram, 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?

PolyGram 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.

What does it cost to trade on PolyGram?

Zero. PolyGram 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.