Offseason
- December 2, 1957: 1957 minor league draft
- Ellis Burton was drafted by the Cardinals from the Pittsburgh Pirates.
- Lee Tate was drafted by the Cardinals from the San Francisco Giants.
- December 5, 1957: Marty Kutyna, Ted Wieand, and Willard Schmidt were traded by the Cardinals to the Cincinnati Redlegs for Curt Flood and Joe Taylor.
Read more about this topic: 1958 St. Louis Cardinals Season