|Minor league affiliations|
|Pioneer League (1964–1971)|
|Major league affiliations|
|Minor league titles|
|League titles||1964, 1965|
Treasure Valley Cubs
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; Boise had been in the league since 1939 and lost its 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. Lack of attendance was cited as the reason for the club's demise in January 1972; they drew only 11,000 at home during the 1971 season, an average of 315 per game..
Notable players in Caldwell were pitchers Ken Holtzman, Dennis Lamp, and Joe Niekro, and outfielder Billy North. Caldwell native and Idaho Vandal Frank Reberger pitched for the Treasure Valley Cubs in 1966.
- Caldwell Cubs players (1967–1971) Michael Pastor was a member of the Caldwell Cubs in 1967.
- Treasure Valley Cubs players (1964–1966) Michael Pastor was a member of the Treasure Valley Cubs in 1966.
- "Treasure Valley wraps up title". Spokane Daily Chronicle. Washington. Associated Press. September 1, 1965. p. 34.
- "Series to settle Pioneer League crown". Spokane Daily Chronicle. Washington. Associated Press. September 1, 1966. p. 28.
- "Cubs drop Caldwell Pioneer League club". Palm Beach Post-Times. Florida. Associated Press. January 15, 1972. p. C5.
- "Chicago Cubs pull franchise at Caldwell". Lewiston Morning Tribune. Idaho. Associated Press. January 16, 1972. p. 15.
- Baseball Reference - Caldwell teams