Houston Astros vs. Washington Nationals

Platform comparison

Market context

The Houston Astros and Washington Nationals face off tonight at Nationals Park in Washington, DC, for the second game of their series, with the Nationals holding a 1–0 advantage after a 12–1 victory in game one. The contest begins at 6:45 PM ET, and the current prediction-market implied probability for an Astros win sits at 48%, suggesting a near-even contest despite the Nationals’ dominant opening performance.

Historically, the Nationals have won 13 of their last 14 games as favourites against the Astros, a streak that frames today’s 48% probability as cautious rather than dismissive of the Astros’ chances. This divergence is notable: DraftKings lists the Nationals as a slight favourite with a moneyline of –122, while analyst consensus from BigAl.com also backs the Nationals, citing their superior pitching and offence. The prediction market’s near-50% split implies a meaningful underestimation of the Nationals’ edge compared to traditional sportsbooks.

Traders should monitor the starting pitchers’ recent form: Tatsuya Imai (Astros) has allowed three or more earned runs in three of his last four starts, while Nationals starter Alvarez has recorded two or fewer in five straight outings. Additionally, the Astros have lost three of their last five games and allowed eight or more runs in three of those, a pattern that could persist given their road struggles against National League opponents. The series’ momentum and pitching disparity are the primary catalysts influencing this contract’s outcome[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

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

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

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 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.

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.