Cleveland Guardians vs. Philadelphia Phillies

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Active sub-markets

Market context

The Cleveland Guardians travel to Philadelphia for a regular-season matchup against the Phillies on 23 May at 4:05 PM ET. The crowd-implied probability of 38% for a Guardians victory reflects Philadelphia as the favoured side, though the gap between the teams' recent form and underlying strength metrics warrants closer examination.

Cleveland finished the 2024 season with a 92-70 record and won the AL Central, whilst Philadelphia posted 95-67 and captured the NL East. The Guardians' pitching depth and defensive efficiency have historically travelled well in road environments, and their bullpen ranked amongst baseball's most effective units. Philadelphia's roster carries greater offensive firepower but has shown vulnerability to elite fastball-heavy pitching schemes—precisely the Guardians' calling card. Historical matchups between these clubs over the past three seasons show tighter margins than preseason projections typically suggest, with Cleveland winning 11 of 20 contests.

Traders should monitor starting pitcher assignments, as the scheduled arms significantly alter expected run production. Recent injury reports from both camps—particularly regarding Philadelphia's outfield depth and Cleveland's infield availability—can shift leverage considerably. Weather conditions at Citizens Bank Park on game day merit attention; afternoon games in late May favour teams with superior bullpen stamina. The settlement window extends to 30 May, allowing for postponement resolution should weather intervene. Current odds imply Philadelphia as a clear favourite, but the 38% probability for Cleveland may undervalue a team with superior recent playoff pedigree and matchup-specific advantages.

Methodology

This page reviews Cleveland Guardians vs. Philadelphia Phillies across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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

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.

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.