Chicago Cubs vs. Pittsburgh Pirates

Platform comparison

Active sub-markets

Market context

The Chicago Cubs face the Pittsburgh Pirates on 25 May at 13:35 ET in a regular-season matchup. The 53% implied probability for a Cubs victory reflects moderate confidence in the home side, though the Pirates remain competitive at implied 47%. This particular fixture sits within the broader National League Central context, where both clubs are jockeying for position in a division that has historically favoured stronger pitching depth and bullpen consistency over raw offensive output.

Historical performance between these franchises shows the Cubs have maintained a slight edge in recent seasons, though the Pirates' unpredictability—particularly in May when roster adjustments are still settling—warrants caution in treating the current odds as decisive. The 53% figure suggests traders across platforms view this as a genuine toss-up rather than a heavily favoured outcome. On Polymarket, this probability translates to decimal odds around 1.89; Kalshi's binary structure would present identical implied probability but with different fee mechanics, whilst Betfair's fractional odds display (roughly 8/11) appeals to traders accustomed to traditional sportsbook formats. The settlement window extending to 1 June allows for postponement coverage, a material consideration given late-May weather volatility in the Midwest.

Traders should monitor starting pitcher announcements, which typically arrive 24–48 hours before game time. Injury updates to either roster—particularly among position players or relief arms—can shift the probability meaningfully. Weather forecasts for Pittsburgh on game day warrant attention, as rain delays or cancellations would trigger the 50-50 resolution clause rather than determining an outright winner.

Methodology

This page compares Chicago Cubs vs. Pittsburgh Pirates specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). PolyGram routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

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.

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.