The 2025 Major League Baseball postseason is officially set, and the chase for the World Series begins Tuesday, September 30, with four Wild Card matchups. Each series is best-of-three, running through October 2 if necessary. All games will air on ESPN platforms, with Spanish broadcasts available on ESPN Deportes and Univision.

Here is what to know about MLB's wild-card series, including the bracket and format in the American and National Leagues.

The Detroit Tigers will be without third baseman Colt Keith in the American League wild-card series against the Cleveland Guardians.

Photos from the Chicago Cubs workout Monday, Sept. 29, 2025, at Wrigley Field before the wild-card series against the San Diego Padres. MLB announces start times for Cubs’ 1st 2 playoff games vs. Padres at Wrigley Field Column: 5 players the Cubs need to step up to make a long postseason run Cubs rookie Cade Horton is disappointed he won’t pitch in the wild-card series: ‘A perfect storm’ ©2025

The wild-card series matchups were finalized after the Cleveland Guardians clinched the AL Central and the Toronto Blue Jays beat the Tampa Bay Rays to win their first AL East title since 2015.

The Dodgers are auditioning pitchers for bullpen roles as the team prepares for the Wild Card series starting Tuesday.

Fans showed their hope in the Toronto Blue Jays securing a spot in the American League Division Series when playoff tickets went on sale Thursday.