Major League Baseball is the highest level of professional baseball in United States and Canada. It was founded in 1869. It is currently composed of 30 teams. One is in Canada and the other twenty nine are in United States. MLB is governed by the Major League Baseball Constitution that has undergone several incarnations in1876 and the most recent revisions being made in 2005. Major league Baseball is divided into two leagues one is the American League and the other is National League. American League contains 14 teams while National League contains 16 teams. These two Leagues are further subdivided into three divisions that are Labeled East, Central and West.
The three division structure dates back to 1994, when the National League expands to 14 teams. Before 1997 these two Leagues met on the field only during the World Series and the All Star Game. The period 1900 to 1919 is commonly called the “Dead ball era” because at that time the games tended to be low scoring. In 1966 Major Baseball League moved to the “Deep South”. In 1969, the two Major Leagues added two teams each. The American League added “Seattle Pilots” and “Kansas City Royals”. The National League added “Montreal Expos” and “San Diego Padres”. In early 2000’s the players hit 40 or 50 home runs in a season, it was considered rare in 1980’s. Then it become apparent that it was a result of players using steroids and other performance enhancing drugs. In 2009, MLB launched MLB Network, which aired 26 live games that year.