The team is composed mainly of players who are in their first year of professional baseball either as draftees or non-drafted free agents.
The team first competed in the Arizona League (AZL) in 2003, succeeding the Kansas City Royals' Florida-based rookie team, the Gulf Coast League Royals.
[3] That season, the team fielded two squads in the league, differentiated by numerical suffixes (1 and 2).
[3] The Royals 1 squad won the league championship, defeating the AZL Rangers in the title game.
For the 2021 season, the team is again fielding two squads, differentiated by color suffixes (Blue and Gold).