In 1993 the league expanded to 14 teams, adding the Colorado Rockies and the Florida Marlins (which became the Miami Marlins shortly after the end of the 2011 season). In 1998, the Arizona Diamondbacks became the league's fifteenth franchise, and the Milwaukee Brewers moved from the AL to the NL, giving the NL 16 teams for the next 15 seasons.
In 1993 the league expanded to 14 teams, adding the Colorado Rockies and the Florida Marlins (which became the Miami Marlins shortly after the end of the 2011 season). In 1998 the Arizona Diamondbacks became the league's fifteenth franchise, and the Milwaukee Brewers moved from the AL to the NL, giving the NL 16 teams for the next 15 seasons.