Cleveland Guardians vs. Philadelphia Phillies

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Active sub-markets

Market context

The Cleveland Guardians visit the Philadelphia Phillies at Citizens Bank Park, with the market pricing Cleveland at about 39% and Philadelphia as the clear favourite. That leaves the Guardians in underdog territory, and the crowd line is broadly in step with the teams’ records: Cleveland arrive 30-22 and have been stronger away from home, while Philadelphia are 25-25 and only 13-14 at home. On season batting numbers, the clubs are close enough that the gap is more about overall run production and venue than a dramatic mismatch.

In comparable spots, a mid-30s to low-40s implied probability usually reflects a live underdog only if the line is being held up by the favourite’s brand rather than a large on-field edge. Philadelphia’s offence has the better slugging profile, and CBS Sports listed them around -187 with a 6.5 total ahead of the series opener, which is consistent with the home side being the consensus pick. That said, Cleveland’s better win rate and solid road record make them a plausible contrarian angle if the price drifts further or if the Phillies are overbet.

The main catalyst is the official line-up and starting-pitching picture, as those will decide whether the pre-game market stays aligned with the Phillies or opens value on Cleveland. Coverage at CBS Sports and other previews has already pointed to Philadelphia as the side to beat, but any late scratch, rest decision, or bullpen usage from the series schedule would matter more than the broader season record. With the game set for late evening in UTC terms, traders should also watch whether the market reacts to confirmed starters and batting order release rather than the opening consensus alone.

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Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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.

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.