Houston Astros vs. Chicago Cubs

Platform comparison

Active sub-markets

Market context

The Houston Astros travel to Chicago to face the Cubs on 24 May at 2:20 PM ET, with Polymarket currently pricing an Astros victory at 40% (USDC settlement on Polygon). This implies roughly 60% implied probability for a Cubs win, reflecting Chicago's home-field advantage and recent form entering late May. The contract remains open through 31 May to accommodate potential postponements, with 50-50 resolution only if the fixture is cancelled outright or ends in a tie—an exceedingly rare outcome in MLB.

Historical matchups between these franchises show competitive balance, though home teams in regular-season play typically command a 3-5 percentage-point edge in win probability models. The Astros' 2023-2024 record against NL Central opponents provides context: they've generally performed well on the road against mid-tier competition, whilst the Cubs' performance at Wrigley Field varies considerably depending on pitching matchups and roster health. Crowd-implied probability at 40% for Houston suggests traders are pricing in Cubs advantage without overwhelming confidence, consistent with a divisional-quality opponent playing away.

Traders should monitor starting pitcher announcements, expected within 48 hours of the fixture. Recent injury reports from both rosters—particularly position players and bullpen depth—typically move these contracts 2-3 points. Weather conditions at Wrigley (wind direction and temperature) can materially affect run-scoring expectations. MLB schedule changes remain possible through late May, though unlikely for a weekday afternoon game. Settlement relies on official MLB statistics, with no ambiguity expected unless the game is postponed beyond the 31 May window.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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

Where can I trade this market with the lowest fees?

On PolyGram, 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.

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.

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 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.