1998 Major League Baseball expansion the American League. Following that transaction, MLB consequently altered its season structure so as to include interleague play throughout the regular season. 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
Triple-A (baseball) Triple-A (baseball) Triple-A (AAA) or Class AAA is the highest level of play in Minor League Baseball in the United States and Mexico. Before 2008, Triple-A leagues also fielded teams in Canada. A total of 30 teams play in the Triple-A International League (IL) and Pacific Coast League (PCL), with 14 teams in the IL and 16 in the PCL. The MLB-independent Mexican League fields 16 teams. Triple-A teams are typically located in large metropolitan areas that do not have Major League Baseball teams, such as San Antonio; Austin; Indianapolis; Columbus; and Nashville. Interleague play between the International League and