Chicago White Sox vs. St. Louis Cardinals odds: Kalshi vs Polymarket
Sun, Sep 13, 2026, 2:15 PM ET · MLB games · $8 traded in 24h across both venues.
Chicago White Sox: Kalshi 54¢ vs Polymarket 54¢, +0.5 pp
Mid prices. A price is the market's probability: 54¢ means 54%. The gap is Kalshi minus Polymarket in percentage points.
Two separate exchanges, two accounts. Links may carry a referral code, which never changes what is shown. Disclosures.
-7.23¢ per $1, after fees
Buy Chicago White Sox @ Polymarket 56¢, St. Louis Cardinals @ Kalshi 48¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Chicago White Sox | 51¢ / 57¢ | 51¢ / 56¢ | +0.5 pp |
| St. Louis Cardinals | 47¢ / 48¢ | 44¢ / 49¢ | +1.0 pp |
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.