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Arizona Complex League

The Arizona Complex League (ACL) is a rookie-level Minor League Baseball league that operates in and around Phoenix, Arizona, United States, run by Major League Baseball since 1988. Before 2021, it was known as the Arizona League (AZL). Along with the Gulf Coast League, it forms the lowest rung of the North American minor league system. No official attendance records are kept as there is no paid admittance fee, and no concessions are sold.

Games are played at the spring training complexes of the teams' parent organizations from mid-June until the end of August. Every Cactus League team fields an Arizona League team. The teams are owned by their parent clubs. Night games are commonly played in the spring training stadium, though games may be played at the team's practice fields.

The regular season is 56 games, with a 35-player roster limit. The rosters consist primarily of players chosen in the Major League Baseball draft two to three weeks before the league begins its season along with players promoted from the parent club's Dominican Summer League affiliate. Players must not have more than three years of previous minor league experience to be eligible to play. Major league players on rehabilitation assignments may also appeared in the league.

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