Houston Astros vs. Chicago Cubs

Platform comparison

Active sub-markets

Market context

The Houston Astros travel to Chicago for a regular-season matchup against the Cubs on 24 May at 2:20PM ET, with the settlement window extending to 31 May to accommodate potential postponements. The current implied probability of 51% for an Astros victory reflects a near-even assessment, typical for games between clubs with comparable recent form. For algorithmic traders, this market presents a baseline case where pre-game adjustments—roster changes, weather conditions, or late-breaking injury reports—could shift the probability meaningfully within the settlement window.

Historical context suggests that regular-season games between these franchises show minimal home-field advantage in aggregate; the Cubs' Wrigley Field environment has produced inconsistent outcomes against visiting AL Central opponents over the past three seasons. The Astros' recent record against NL Central teams sits marginally above .500, whilst the Cubs' home performance against AL teams hovers near parity. These patterns indicate that the 51% probability is anchored to structural factors rather than recent momentum, making it a candidate for conditional order strategies that trigger on roster announcements or weather updates.

Traders should monitor MLB injury reports through 23 May for developments affecting either team's starting pitcher or key position players; pitching matchups historically account for 3–5 percentage-point swings in pre-game probabilities. Additionally, weather forecasts for Chicago on game day warrant tracking, as wind direction and temperature at Wrigley materially affect ball carry distance. The official MLB schedule and ESPN injury updates remain the primary data sources for real-time adjustments.

Methodology

This page reviews Houston Astros vs. Chicago Cubs across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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

Is this market available outside the US?

PolyGram 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.

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 PolyGram?

Zero. PolyGram 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.

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.