1998 Major League Baseball expansion 1998 Major League Baseball expansion The 1998 Major League Baseball expansion resulted in the establishment of Major League Baseball (MLB)'s 29th and 30th teams beginning play for the 1998 season. After initiating an expansion committee in March 1994, 27 groups representing nine cities submitted bids for the proposed expansion teams. After a yearlong process, on March 9, 1995, the league awarded the National League franchise to Phoenix and the American League franchise to Tampa. The Arizona Diamondbacks and the Tampa Bay Devil Rays (currently the Tampa Bay Rays), would subsequently begin play for the 1998 season. With the successes of
The National Baseball Association's top 100 minor league teams (8); California League, Western Association, and Western League (4). Thirty-one teams competed at the Double-A classification level, the most of any class, followed by Class A (24); Class C (12); Class B (11); Triple-A (10); Class D (7); Class A1 and independent (2); and Class A-Advanced (1). Twenty-seven teams competed in the 1920s, the most of any decade, followed by the 1940s (16); 1930s (13); 1900s and 1950s (10); 1910s and 1980s (6); 1970s (5); 1990s (4); and 1960s (3). The National Baseball Association's top 100 minor league teams In 2001, during the centennial celebration of the National Association of