Overview
In Major League Baseball, the general manager (GM) of a team typically controls player transactions and bears the primary responsibility on behalf of the ballclub during contract discussions with players.
Roles and responsibilities
The general manager is normally the person who hires and fires the coaching staff, including the field manager who acts as the head coach. In baseball, the term manager used without qualification almost always refers to the field manager, not the general manager.
Before the 1960s, and in some rare cases since then, a person with the general manager title in sports has also borne responsibility for the non-player operations of the ballclub, such as ballpark administration and broadcasting. Ed Barrow, George Weiss and Gabe Paul were three baseball GMs noted for their administrative skills in both player and non-player duties.
History and evolution
In the first decades of baseball's post-1901 modern era, responsibilities for player acquisition fell upon the club owner and/or president and the field manager. In some cases, particularly in the early years of the American League, the owner was a former player or manager himself: Charles Comiskey of the Chicago White Sox, Connie Mack of the Philadelphia Athletics, and Clark Griffith of the Washington Senators are three prominent examples. Other owners tended to be magnates from the business world, although some, like Brooklyn Dodgers' president Charles Ebbets, worked their way from front-office jobs into ownership positions. Most deferred player personnel evaluations to their on-field managers. One notable exception, cited by Mark L. Armour and Daniel R. Leavitt in their book In Pursuit of Pennants, was German immigrant Barney Dreyfuss, owner of the Pittsburgh Pirates from 1900 to 1932. Dreyfuss had no playing background, but was one of the most astute judges of talent of his time; under him, Pittsburgh won six National League pennants and two World Series titles. The New York Giants' John McGraw, who also held a minority ownership stake in the team, is an example of a powerful manager who, during his three decades at the Giants' helm, exerted control over off-field aspects of the team's operation.
From Wikipedia (CC BY-SA 4.0).