Offseason
- November 24, 1948: Ray Jablonski was drafted by the Cardinals from the Boston Red Sox in the 1948 minor league draft.
- Prior to 1949 season (exact date unknown)
- Dick Rand was signed as an amateur free agent by the Cardinals.
- Neal Hertweck was signed as an amateur free agent by the Cardinals.
Read more about this topic: 1949 St. Louis Cardinals Season