|Previous||AAA (1958–1959, 1966–1997)|
|Minor league affiliations|
|League||Pacific Coast League (1958–1959, 1966–1997)|
|Major league affiliations|
|Previous||San Francisco Giants (1958–1959, 1966–1997)|
|Minor league titles|
|League titles||1959, 1977|
|Division titles||1977, 1985, 1996, 1997|
The franchise was a member of the Triple-A Pacific Coast League (PCL), and were the top minor league affiliate of the San Francisco Giants. The Firebirds were forced to leave Phoenix following the 1997 season, as the new National League expansion team, the Arizona Diamondbacks would begin play in Phoenix the following year. In a complicated series of events, the owners of the Firebirds moved their team to Tucson, Arizona, and became the Tucson Sidewinders, dropping their affiliation with the Giants in favor of the expansion Diamondbacks. The owners of the existing Tucson Toros then moved their franchise to Fresno, California, thus ending a 92-year hiatus of PCL baseball in Fresno. The transplanted Toros, renamed the Fresno Grizzlies, became the Giants' new PCL affiliate.
The Firebirds were known as the Phoenix Giants until the 1986 season. They were affiliated with the San Francisco Giants for their entire existence, now a rarity in the minor leagues. The Giants' still have spring training facility in the Phoenix area, but in Scottsdale where the Firebirds played from 1992 to 1997.
The Firebirds played their home games at Phoenix Municipal Stadium until moving to Scottsdale Stadium upon its reopening in 1992. Their final regular season game in 1997 was played at the old ball park known locally as Phoenix Muni, which was also the spring training home of the Oakland Athletics until their move to the former spring training home of the Chicago Cubs, Hohokam Stadium in Mesa in 2015. The team made the 1997 PCL playoffs their final year, which extended their existence by a couple weeks. The Firebirds defeated the Colorado Springs Sky Sox 3-0 in the first round but lost the championship series 3 games to 1 to the Edmonton Trappers.
The Phoenix Giants won two PCL championships in 1959 and 1977. The franchise never won a championship title under the Firebirds name.
- Championship: Defeated Salt Lake City 3 games to 2
- Division Series: Lost to Las Vegas Stars 3 games to 2
Several Giants alumni like Willie McCovey, Bobby Bonds, Matt Williams, Steve Stone, and Kirt Manwaring played in Phoenix. Some of the Phoenix alumni went on to San Francisco, to take part in two of the Giants' National League titles (1962 and 1989).