March 22, 2019

Cardinals  designate Chasen Shreve for assignment

March 25, 2019

Cardinals  place Carlos Martinez on the injured list

April 16, 2019

Cardinals  place Mike Mayers on the injured list

Cardinals  place Tyler O'Neill on the injured list

April 17, 2019

Cardinals  place Harrison Bader on the injured list

April 22, 2019

Cardinals  place Michael Wacha on the injured list

May 31, 2019

Cardinals  place Yadier Molina on the injured list

June 10, 2019

Cardinals  place Adam Wainwright on the injured list

June 11, 2019

Cardinals  sign Zack Thompson

June 13, 2019

Cardinals  place Ryan Helsley on the injured list

June 19, 2019

Cardinals  sign Andre Pallante

June 25, 2019

Cardinals  place Jordan Hicks on the injured list

June 29, 2019

Cardinals  place Marcell Ozuna on the injured list

July 02, 2019

Cardinals  place Matt Carpenter on the injured list

July 11, 2019

Cardinals  place Yadier Molina on the injured list

July 16, 2019

Cardinals  place Matt Carpenter on the injured list

July 23, 2019

Cardinals  designate Chasen Shreve for assignment

July 29, 2019

Zac Rosscup traded from Dodgers  to Cardinals 

August 03, 2019

Cardinals  place Tyler O'Neill on the injured list

August 04, 2019

Cardinals  designate Mike Mayers for assignment

August 30, 2019

Cardinals  place Lane Thomas on the injured list

October 31, 2019

Marcell Ozuna became a free agent

Adam Wainwright became a free agent

Michael Wacha became a free agent

November 12, 2019

Cardinals  sign Adam Wainwright as a free agent

November 20, 2019

Cardinals  designate Dominic Leone for assignment

Cardinals  sign Nabil Crismatt

November 25, 2019

Cardinals  release Dominic Leone

December 17, 2019

Cardinals  sign Kwang Hyun Kim as a free agent

December 18, 2019

Cardinals  designate Adolis Garcia for assignment

December 21, 2019

Adolis Garcia traded from Cardinals  to Rangers