Kansas City Royals vs. Pittsburgh Pirates odds, Sep 18: Kalshi vs Polymarket
Pittsburgh Pirates 62% on Kalshi, 61% on Polymarket. Both exchanges' prices for every outcome of Kansas City Royals vs. Pittsburgh Pirates, Sep 18, $123 traded in 24 hours, updated every 45 seconds.
Fri, Sep 18, 2026, 6:40 PM ET · MLB games · $123 traded in 24h across both venues
Pittsburgh Pirates: Kalshi 62¢ vs Polymarket 61¢, +1.0 pts
Mid prices. A price is the market's probability: 62¢ means 62%. The gap is Kalshi minus Polymarket, in points.
Two separate exchanges, two accounts. Links may carry a referral code, which never changes what is shown. Disclosures.
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Kansas City Royals | 38¢ / 39¢ | 39¢ / 40¢ | -1.0 pts |
| Pittsburgh Pirates | 61¢ / 62¢ | 60¢ / 61¢ | +1.0 pts |
Price history, last 3 days
How this is matched
Games are matched across the two exchanges by league, team codes and date. Polymarket prices come from its live order book, Kalshi from its public API. Refreshed every 45 seconds.
What this is not
Read-only. Nothing here places or routes orders and nothing is advice. Fees, slippage and the time it takes to move money between venues are not in these numbers.