Offseason
- October 15, 1964: Pedro Borbón was signed as an amateur free agent by the St. Louis Cardinals.
- November 30, 1964: Chris Krug was drafted from the Cardinals by the Chicago Cubs in the 1964 minor league draft.
- December 7, 1964: Gordie Richardson and Johnny Lewis were traded by the Cardinals to the New York Mets for Tracy Stallard and Elio Chacón.
- March 1, 1965: Willie Montañez was signed as an amateur free agent by the Cardinals.
Read more about this topic: 1965 St. Louis Cardinals Season