Chicago Cubs vs. Pittsburgh Pirates

Platform comparison

Active sub-markets

Market context

The Cubs travel to Pittsburgh for a midweek matchup on 25 May, with the market currently pricing Chicago as slight favourites at 53 per cent. Recent form has shifted the underlying dynamics: the Cubs won three of their last four games heading into this fixture, whilst the Pirates have struggled through May with a sub-.500 record. Pitching assignments remain the primary variable—the Cubs' starter carries a 3.20 ERA this season, whilst Pittsburgh's rotation has been inconsistent, with their scheduled starter posting a 4.65 ERA across twelve starts.

Historical matchups between these clubs over the past three seasons show the Cubs hold a marginal edge in head-to-head records, though home-field advantage at PNC Park has occasionally compressed that advantage. The current 53 per cent probability reflects modest confidence rather than conviction, suggesting the market views this as a competitive game where roster availability and bullpen depth could prove decisive.

Traders should monitor roster updates through to first pitch, particularly any late-inning relief availability for either side. Weather conditions at Pittsburgh on game day—temperature and wind direction—can meaningfully affect outcomes at PNC Park given its dimensions. Any injury announcements to key position players or pitchers in the 24 hours before the 1:35 PM ET start would likely shift the probability, as would unexpected lineup changes that affect offensive matchups against the scheduled starters.

Methodology

This page reviews Chicago Cubs vs. Pittsburgh Pirates 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

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

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 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.

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.