A US Open Cup prediction market lets traders take positions on real-world US Open Cup outcomes. Each market offers shares priced between 0¢ and 100¢, where the price represents the implied probability that the outcome occurs. You can browse all live US Open Cup markets on this page.

There are currently 1 active US Open Cup markets on Polymarket. The full list is available on this page.

The top US Open Cup markets by volume right now are Columbus Crew vs. Saint Louis City SC. These are typically driven by upcoming matchups, breaking injury news, and lineup confirmations.

The next scheduled US Open Cup event with a market on Polymarket is Columbus Crew vs. Saint Louis City SC on October 22, 2026.

Each contract is priced between 0¢ and 100¢. A US Open Cup team or player priced at 65¢, for example, means the market is implying a 65% probability that they win or hit the stated outcome. The other side trades at 35¢.

US Open Cup markets typically cover individual game and match outcomes, season-long awards, championship futures, and player props where available. The exact mix depends on the US Open Cup schedule and what traders are most active on at any given time — see the live list on this page for what's currently open.

Prices tend to move fastest on news that changes who is playing or how they'll perform — confirmed lineups, injury updates, suspensions, weather, and in-play developments. The 24–48 hours before a US Open Cup event are typically the most active window for price movement.