Here’s how the 2026 postseason teams were built

A roster construction analysis breaks down how the 12 teams in the 2026 Major League Baseball postseason were assembled through the draft, free agency, and trades. The Cleveland Guardians feature the most homegrown playoff roster with 16 drafted or internationally signed players, while the Los Angeles Dodgers derived 24.5 WAR from outside free-agent acquisitions. Meanwhile, active trading teams such as the Tampa Bay Rays, Milwaukee Brewers, and Boston Red Sox relied heavily on acquired talent.

The Houston Astros qualified for the postseason by winning the AL West despite holding the lowest overall WAR among playoff clubs at 31.7. Key Astros contributors include trade acquisitions Yordan Alvarez and Isaac Paredes alongside draft picks Jeremy Peña and Hunter Brown. Cleveland built its 46.1 WAR roster around top draft picks Gavin Williams, Chase DeLauter, and Travis Bazzana, as well as veteran international signing José Ramírez.