 A rookie league affiliate of the Chicago Cubs, the team played in the Pioneer League from 1964 through 1971, and their home field was Simplot Stadium in Caldwell.During their first three seasons, they were known as the Treasure Valley Cubs as nearby Boise had lost its minor league team after the 1963 season.The Treasure Valley Cubs were champions of the Pioneer League in their first two seasons, and were runners-up in 1966.