The following outline is provided as an overview of and topical guide to baseball:
Baseball – bat-and-ball sport played between two teams of nine players each. The aim is to score runs by hitting a thrown ball with a bat and touching a series of four bases arranged at the corners of a ninety-foot diamond.
Exercise – bodily activity that enhances or maintains physical fitness and overall health or wellness.
Game – structured activity, usually undertaken for enjoyment and sometimes used as an educational tool. Games are distinct from work, which is usually carried out for remuneration, and from art, which is more concerned with the expression of ideas. However, the distinction is not clear-cut, and many games are also considered to be work (such as professional sports).
Bat-and-ball game – field game played by two teams which alternate between "batting" and "fielding" roles. The fielding team defends, so only the batting team may score, but they have equal chances in both roles.
Sport – form of physical activity which, through casual or organised participation, aim to use, maintain or improve physical fitness and provide entertainment to participants.
Competitive sport – sport in which one or more participants or teams compete against one another. The one that is the most successful in achieving the objective of the game or sport event is the winner.
Recreational sport – sport engaged in as a leisure time activity.
Spectator sport – sport that is characterized by the presence of spectators, or watchers, at its matches. Spectator sports are a form of entertainment.
Professional sport – sport in which the athletes receive payment for their performance.
Buck O'Neil Lifetime Achievement Award, presented no more often than every three years by the Hall of Fame for outstanding contributions to baseball's image (article includes a list of honorees)
People not directly connected with the sport who nevertheless made a contribution: