| | Major League Baseball Encyclopedia Article @ LaunchBase.net (Launch Base) (Site not responding. Last check: 2007-10-22) |
 | | More specifically, Major League Baseball refers to the entity that operates North American professional baseball's two major leagues, the National League and the American League, by means of a joint organizational structure which has existed between them since 1903. |
| | Major League Baseball is governed by the Major League Baseball Constitution, an agreement that has undergone several incarnations since 1876 then called the NL Constitution, with the most recent revisions being made in 2005. |
| | Players and teams prepare for the season in spring training, primarily in Florida and Arizona, during February and March. |
| www.launchbase.net /encyclopedia/Major_League_Baseball (3503 words) |
