 the national baseball hall of fame and museum is an american museum and hall of fame in cooperstown, new york. it is the central point for the study of the history of baseball in the united states and beyond, the display of baseball-related artifacts and exhibits, and the honoring of persons who have excelled in playing, managing, and serving the sport. elections commenced in 1936 for the selection of worthy individuals to be honored by induction to the baseball hall of fame, though the first induction ceremonies were not held until the hall opened in 1939. through the elections for , a total of 306 individuals have been inducted, including 240 players, 23 managers, 10 umpires, and 33 pioneers and executives. each is listed along with his primary position; that is, the position or role in which the player made his greatest contribution to baseball, according to the hall of fame. according to the current rules, players must have at least 10 years of major league experience to be eligible for induction. in addition, they must be retired for at least 5 years if living, or deceased for at least 6 months. players meeting these qualifications must pass through a screening committee, and are then voted on by the baseball writers' association of america (bbwaa). each writer may vote for up to 10 players; to be admitted into the hall of fame, a player must be approved by 75% of those casting ballots. players receiving less than 5% approval are removed from future bbwaa ballots. the current rules, most recently revised in july 2010, allow that all individuals eligible for induction but not for the bbwaa ballotâplayers who have not been approved by the bbwaa election process within 20 years of their retirement, umpires, managers, pioneers, and executivesâmay be considered by the veterans committee in every third year, based on the era in which each individual candidate made his 
Lists_of_baseball_players National_Baseball_Hall_of_Fame_inductees