Miami Marlins vs. Pittsburgh Pirates

Platform comparison

Active sub-markets

Market context

The Miami Marlins travel to Pittsburgh on 13 June for an afternoon fixture against the Pirates, with Polymarket currently pricing a Marlins victory at 34% (approximately -200 implied odds). This represents a substantial underdog position for Miami, reflecting the Pirates' stronger standing in the National League Central division heading into the contest. The settlement window extends to 20 June at 20:05 UTC, allowing for postponement resolution should weather or scheduling complications arise.

Historical matchups between these franchises show the Pirates hold a marginal advantage in recent seasons, though divisional games frequently defy pre-match expectations. The Marlins' win probability of 34% sits below their typical performance baseline, suggesting either significant roster absences, unfavourable pitching matchups, or Pittsburgh's recent form has shifted trader sentiment decisively. Examining comparable mid-season divisional contests on Polymarket reveals similar probabilities typically emerge when the visiting team lacks recent momentum or faces a notably superior starting pitcher.

Traders should monitor roster announcements through 12 June, particularly regarding starting pitcher confirmation and any late injury disclosures. Pittsburgh's recent performance against comparable opponents and Miami's road record in June provide contextual anchors. Weather forecasts for Pittsburgh on game day merit attention, as afternoon games in early summer can face postponement risk. The conditional token mechanics on Polygon mean positions settle directly against the official MLB final result, with no ambiguity provided the game concludes within regulation play.

Methodology

We track Miami Marlins vs. Pittsburgh Pirates 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

Where can I trade this market with the lowest fees?

On Polymarket UK, 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?

Polymarket UK 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 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.