Jack William Radtke
- Bats Both, Throws Right
- Height 5' 7", Weight 160 lb.
- Debut August 1, 1936
- Final Game September 26, 1936
- Born April 14, 1913 in Denver, CO USA
- Died October 24, 2006 in Twin Falls, ID USA
Infielder Jack Radtke had a cup of coffee with the 1936 Brooklyn Dodgers and made a number of pinch-running appearances during that time. He scored eight runs even though he collected only three hits; he also stole three bases.
Radtke later spent time with the Twin Falls Cowboys, both as a player and the team's business manager. He also later owned and ran a construction company for 30 years.