Cleveland Guardians vs. Philadelphia Phillies

Platform comparison

Active sub-markets

Market context

The Guardians and Phillies are due to meet in Philadelphia on Sunday, with the market sitting at 39% for Cleveland despite the home side being priced as the stronger win candidate. The main change in the last 24 to 48 hours is simply that the game has moved from distant preview to immediate execution: line-ups, starting pitchers and late injury news now matter more than broad team records. Cleveland comes in at 30-22 and has been better away from home than the Phillies have been at Citizens Bank Park, while Philadelphia is 25-25 and only just above .500 overall.

Recent head-to-head results do not point strongly one way. The clubs split their two-game set in May 2025, and longer-run series data shows a fairly even matchup, with Philadelphia holding only a slight edge across the past 18 meetings. That kind of mixed history helps explain why the market is not treating Cleveland as a long-shot: a 39% chance is consistent with a live underdog whose path is usually tied to pitching quality and run prevention rather than sustained offensive strength. Cleveland’s low-scoring profile and Philadelphia’s modest home record both support a relatively compressed price.

For traders, the key catalysts are the probable starters, any late rest decisions and the line-up cards around first pitch, which is scheduled for 1:35 pm ET on 24 May. ESPN lists the game at Citizens Bank Park and shows Cleveland’s road record as a notable strength relative to Philadelphia’s home split. Weather is currently not being flagged as a factor on the game page, but any change there would affect a day game in Philadelphia. Philadelphia’s power edge is also relevant: the team has more home runs than Cleveland on the season, so any confirmation of a weakened Guardians bullpen or a favourable batting order would matter quickly.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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.

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 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.