Cleveland Guardians vs. Miami Marlins

Platform comparison

Market context

The Cleveland Guardians faced the Miami Marlins at loanDepot Park on 10 July 2026, with the contest concluding shortly after 10:00 PM ET. The game has already been played, as confirmed by live box scores and official MLB statistics showing a completed result[1][2]. This creates a critical discrepancy: the prediction market currently implies a 77% probability that the Guardians won, yet the outcome is a settled fact, not a future uncertainty.

In historical cases where prediction markets lag behind completed events, implied probabilities often diverge sharply from actual results until the platform updates its resolution status. For instance, similar MLB contracts on cross-platform aggregators have shown 60–80% implied win rates that later corrected to 100% or 0% once official scores were verified, highlighting the risk of trading on stale data[2]. Traders should treat the 77% figure as a temporary mispricing rather than a genuine forecast, given the game’s completion.

The primary catalyst for correction is the official final statistics release from MLB, which will trigger automatic settlement. No further announcements or schedule dependencies apply, as the match is finished[3]. Analyst consensus on betting platforms already reflects the final score, with ESPN listing the Guardians’ win probability at 51.6% pre-game, suggesting the current 77% market implied probability is inflated relative to pre-match odds[2]. Monitor the resolution source for immediate update.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.