Miami Marlins vs. Philadelphia Phillies

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Active sub-markets

Market context

The Miami Marlins travel to Philadelphia on 17 June for a regular-season matchup against the Phillies, with the contest scheduled for 1:05 PM ET. The 96% crowd-implied probability heavily favours a Phillies victory, a positioning that warrants examination against available sportsbook lines and recent form data. This divergence between prediction-market consensus and traditional betting markets often signals either sharp consensus or mispricing of situational factors.

Historically, home-field advantage in mid-June MLB contests carries measurable weight, though the Phillies' recent performance trajectory matters more than venue alone. The Marlins have typically underperformed relative to divisional peers, whilst Philadelphia has maintained competitive positioning within the National League East. Comparable June matchups between these franchises show the Phillies winning approximately 58–62% of such encounters over the past five seasons, suggesting the 96% reading may overstate the Phillies' true winning probability by 30–40 percentage points.

Key variables for traders include starting pitcher assignments—confirmed lineups typically emerge 24 hours before first pitch—and any late roster moves or injury updates affecting either bullpen depth or offensive availability. Weather conditions at Citizens Bank Park, particularly wind direction affecting fly-ball carry, can materially shift run-scoring expectations. Recent MLB injury reports and team-specific announcements should be monitored through official MLB channels and team media through the settlement window closure on 24 June.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Best Prediction Markets 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.

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 Best Prediction Markets UK?

Zero. Best Prediction Markets 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 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.