The Arizona Diamondbacks, often shortened as the D-backs, are an American professional baseball franchise based in Phoenix, Arizona. The club competes in Major League Baseball (MLB) as a member of the. The official website of the Arizona Diamondbacks with the most up-to-date information on scores, schedule, stats, tickets, and team news. Now's the time to get your Diamondbacks tickets at Vivid Seats! View Arizona Diamondbacks schedule & seating information for all upcoming games. Do., 6. Juli.