Cleveland Guardians vs. Philadelphia Phillies

Platform comparison

Active sub-markets

Market context

The Cleveland Guardians travel to Philadelphia on 23 May for a 4:05 PM ET fixture against the Phillies, with Polymarket pricing the Guardians' victory at 38% (USDC settlement on Polygon). This represents a substantial underdog position, reflecting Philadelphia's stronger regular-season record and home-field advantage. The settlement window extends to 30 May at 20:05 UTC, allowing for postponements or rescheduling within that seven-day buffer.

Historical matchups between these franchises show the Phillies have held a slight edge in recent seasons, though Cleveland's 2023 World Series appearance demonstrated their capacity to compete at the highest level. The current probability discount for the Guardians aligns with typical home-team pricing advantages in MLB markets; Philadelphia's home record typically outperforms road performance by 3–5 percentage points across comparable teams. Weather conditions at Citizens Bank Park in late May favour neither side distinctly, though afternoon games occasionally see wind patterns favouring hitters.

Traders should monitor starting pitcher assignments, which MLB typically confirms 24–48 hours before game time. Injury reports for key position players—particularly any late-inning bullpen availability for either side—can shift conditional token valuations meaningfully. Recent roster moves or trades affecting either team's depth would constitute material information. The Guardians' recent form heading into this fixture and any lineup adjustments from either manager warrant attention, as these factors often precede significant repricing on Polymarket's order book.

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.

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.

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.