A MLB prediction market lets traders take positions on real-world MLB 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 MLB markets on this page.

There are currently 16 active MLB markets, with a combined trading volume of $150.9K. The full list is available on this page.

The top MLB markets by volume right now are San Diego Padres vs. Milwaukee Brewers, Chicago White Sox vs. Cleveland Guardians, and New York Yankees vs. Tampa Bay Rays. These are typically driven by upcoming matchups, breaking injury news, and lineup confirmations.

The next scheduled MLB event with a market on Polymarket is Chicago White Sox vs. Cleveland Guardians on October 3, 2026.

Each contract is priced between 0¢ and 100¢. A MLB 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¢.

MLB markets typically cover individual game and match outcomes, season-long awards, championship futures, and player props where available. The exact mix depends on the MLB 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 MLB event are typically the most active window for price movement.