Time Travel Baseball included players from early 1900s to the late 70s. Expansion sets included players in the early 80s. The game also had special rules to allow you to play in various eras of baseball. These special era rules allowed you to see how players of the 70s may have fared when playing in the dead-ball era. One of the expansion sets you would even included a player card with your name on it when you ordered from the manufacturer.