The term LB. DIVISIONS is an abbreviation for League Baseball Divisions. These divisions are part of Major League Baseball, which is the highest level of professional baseball in the United States and Canada. The divisions are divided into two leagues, the American League and the National League, each with three divisions. The divisions are further divided into five teams each. The teams compete against each other to determine who will advance to the playoffs and ultimately the World Series. The term OZS stands for the three divisions in the American League: the East, Central, and West.