The Arizona Diamondbacks are the Major League Baseball team in Arizona. Since its inception as an expansion franchise in 1998, the team has won a world championship (2001) and made six postseason appearances. The club has played in front of 32 million fans at Chase Field, which features a signature swimming pool, retractable roof and a kids play area called the Phoenix Children’s Hospital Sandlot. For more information about the D-backs, or to purchase game tickets, visit dbacks.com