The Colorado Rockies' 1999 season was the seventh for the Major League Baseball (MLB) franchise located in Denver, Colorado, their seventh in the National League (NL), and fifth at Coors Field. The team competed in the National League West, finishing in fifth and last place with a record of 72–90. Jim Leyland, a longtime manager in MLB, debuted as the Rockies' new manager, and resigned following the season.