: Allowed users to create or modify custom stadiums.
: A new guided experience to help both newcomers and veterans navigate the deep management systems. : Allowed users to create or modify custom stadiums
: Fully licensed by MLB and the MLBPA, featuring authentic rosters, logos, and leagues. featuring authentic rosters
: The game remains listed on the Steam Community for those who already own it in their library. : Allowed users to create or modify custom stadiums
As of April 2026, the game is no longer the current version in the series (OOTP 27 is the latest). Official installers for older versions are primarily provided for customers who have already purchased a license.
OOTP 21 introduced several significant upgrades to the franchise:
: Implementation of then-new 2020 MLB rules, such as 26-man rosters and the three-batter minimum for relief pitchers.