Cleveland Guardians vs. Philadelphia Phillies

Platform comparison

Active sub-markets

Market context

The Cleveland Guardians travel to Philadelphia to face the Phillies on 24 May at 1:35 PM ET in a regular-season matchup. The current 55% implied probability favouring Cleveland reflects modest confidence in the visiting side, with the settlement window extending to 31 May to accommodate any postponements. Across major prediction platforms, this probability translates differently: Polymarket displays it as approximately 1.82 decimal odds, whilst Kalshi's binary contract structure presents it as a straightforward YES/NO with identical implied probability but distinct fee mechanics—Kalshi typically charges 2% on net winnings rather than Polymarket's variable maker-taker model. Betfair and Smarkets would show comparable odds around 1.80–1.85, though their liquidity and spread dynamics often diverge significantly from centralised platforms.

Historical matchups between these franchises provide limited directional signal for a single game, though Cleveland's recent regular-season performance and Philadelphia's home-field advantage merit consideration. The Phillies' ballpark, Citizens Bank Park, has favoured left-handed batters and produced elevated scoring in May historically. Traders should monitor roster announcements through 24 May—specifically any late injury disclosures or bullpen availability changes—as these frequently shift single-game probabilities by 3–5 percentage points on prediction markets. Weather conditions at game time, particularly wind direction and temperature affecting ball carry, represent a secondary catalyst that tends to move odds on day-of-play.

Methodology

We read Cleveland Guardians vs. Philadelphia Phillies from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). PolyGram routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

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.

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.