Houston Astros vs. Chicago Cubs

Platform comparison

Active sub-markets

Market context

The Houston Astros and Chicago Cubs are due to meet on 22 May in a game that has drawn a slight Cubs lean in the market, with the crowd pricing Chicago at 54% and Houston at 46%. That sits close to a coin flip, which is consistent with two teams heading in different directions but not by much: ESPN lists the Cubs at 29-21 and the Astros at 20-31, while the Cubs have been carrying a five-game losing streak into the matchup. Recent comparable results point to the market’s caution around form: Chicago have just been shut out 2-0 by Houston in the series, and that kind of low-scoring, one-run-sensitive profile can keep a win market tight even when one side’s record looks stronger.

For traders, the main catalysts are whether Chicago can halt the slide and whether Houston’s recent edge in the matchup repeats with the same pitching setup. The market will also move on any late injury or lineup news, especially if either club rests regulars or changes the starting pitcher after the scheduled first pitch. ESPN’s game page and the recent Cubs postgame reaction both frame this as a form-driven contest rather than one decided by standing alone, so late batting-order confirmation and bullpen availability are likely more important than broad season trends. The window to resolve runs until 29 May, so any postponement or make-up scheduling would keep the market open until the game is actually completed.

Sources: 1 · 2 · 3 · 4 · 5

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

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

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 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.

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.