Sports in Phoenix mirroring the major league teams which play in the Cactus League. The only two Cactus League teams which do not have a rookie league team playing in Phoenix are the Kansas City Royals and the Colorado Rockies. The Arizona Fall League is an off-season league run by Major League Baseball, and consists of six teams made up of some of the most talented minor league players in baseball. Unlike baseball's minor leagues, like AAA teams, the teams are not affiliated with a single major-league team. Each of the six teams is affiliated with five major league teams, all of which
1977 Major League Baseball expansion 1977 Major League Baseball expansion The 1977 Major League Baseball expansion resulted in the establishment of expansion franchises in Seattle and Toronto in the American League of Major League Baseball. The Seattle Mariners and Toronto Blue Jays began play in the 1977 Major League Baseball season, becoming the 25th and 26th teams in Major League Baseball. Seattle and Toronto were included in a list of potential expansion cities in a survey conducted by the American League in 1960. The others were Atlanta, Buffalo, Dallas–Fort Worth, Denver, Oakland, and San Diego (all of which received franchises eventually through expansion or relocation