Miami Marlins vs. Pittsburgh Pirates

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Active sub-markets

Market context

The Miami Marlins travel to Pittsburgh on 12 June for an evening fixture against the Pirates, with first pitch at 6:40PM ET. The market currently prices a Marlins victory at 24%, implying the Pirates are favoured at roughly 76% implied probability. Settlement occurs by 19 June 2026, allowing for postponement handling under MLB's standard make-up protocols.

Historical matchups between these franchises show the Pirates have held a modest edge in recent seasons, though neither team consistently dominates the other. The 24% probability for Miami reflects both Pittsburgh's stronger 2025 performance trajectory and the Marlins' ongoing rebuilding phase. For algorithmic traders, this probability sits near typical underdog thresholds where conditional orders become relevant—a Marlins win would represent a significant deviation from baseline expectations, making it useful as a hedge component within broader MLB portfolios rather than a standalone position.

Traders should monitor starting pitcher assignments and injury reports through to game day, as these remain the primary drivers of game-level variance in MLB markets. Recent roster moves or bullpen availability changes can shift win probability models by 5–8 percentage points. Additionally, weather conditions at PNC Park—particularly wind direction affecting fly ball distances—warrant tracking via standard meteorological feeds. The settlement window's seven-day buffer after the scheduled date accommodates rain delays common to early June baseball, though outright cancellations without rescheduling remain rare under current MLB scheduling practices.

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Is this market available outside the US?

Polymarket Bot 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.

What does it cost to trade on Polymarket Bot UK?

Zero. Polymarket Bot UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.