Each year (beginning in 2005), mascots are elected into the Mascot Hall of Fame by the voting membership and an executive committee made up of performers, sports executives, and other individuals intimate with the mascot community. The mascots go through a nomination process that ends with the Executive Committee selecting six finalist in each category to be placed on the ballot for consideration. There is a public online vote that contributes a percentage of the final tally. In 2006, the Hall added a separate class to honor college mascots.
Between 1971 and 1977, nine players from the Negro Leagues were inducted by a special Negro Leagues Committee, which was given the task of identifying worthy players who played in the Negro Leagues prior to the breaking of baseball's color line . Since 1977, players from the Negro Leagues have been considered by the Veterans Committee, and nine more individuals have been approved by that body.  In 2005, the Hall announced the formation of a Committee on African-American Baseball, which held a 2006 election for eligible figures from the Negro Leagues and earlier 19th-century teams;  17 additional Negro League figures were chosen in that election, including executive Effa Manley , the first woman inducted.