Miami Marlins vs. Houston Astros

Platform comparison

Market context

The Houston Astros have already secured an 8-5 victory over the Miami Marlins in the game scheduled for 20 July, with Jeremy Peña hitting a grand slam and Yordan Alvarez scoring twice to end a four-game losing streak for Houston [1][3]. Because the contest has concluded, the prediction market titled “Miami Marlins vs. Houston Astros” cannot resolve to “Miami Marlins,” rendering the 0% YES crowd-implied probability for a Marlins win factually accurate and final.

Historically, prediction markets for MLB games that settle after the event has finished show immediate convergence to 0% or 100% depending on the outcome, with no latency for trader adjustment once official statistics are published by MLB [1]. Comparable cases from the 2025 season demonstrate that markets resolving post-game maintain their final probability without reopening, as the governing body’s final statistics are the primary resolution source and eliminate ambiguity [1].

Traders should monitor the official MLB final statistics page for any retroactive adjustments, though no such changes are anticipated given the clear 8-5 scoreline and the absence of reported disputes over the result [1]. The settlement window ending on 28 July 2026 serves only as a formal administrative deadline, not a period for new information, since the game’s outcome is already confirmed by multiple beat-reporter sources including the Associated Press [1]. No further announcements, schedule changes, or key absences will alter the resolution, as the event is complete.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Miami Marlins vs. Houston Astros. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

Which sports markets are available?

Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.