Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 08/31/19 | St. Louis Cardinals recalled LHP Genesis Cabrera from Memphis Redbirds. |
| 08/30/19 | St. Louis Cardinals activated LF Tyler O'Neill from the 10-day injured list. |
| 08/30/19 | St. Louis Cardinals placed CF Lane Thomas on the 10-day injured list retroactive to August 28, 2019. Right wrist fracture. |
| 08/28/19 | St. Louis Cardinals released CF Drew Robinson. |
| 08/26/19 | St. Louis Cardinals sent OF Tyler O'Neill on a rehab assignment to Springfield Cardinals. |
| 08/26/19 | St. Louis Cardinals sent OF Jose Martinez on a rehab assignment to Springfield Cardinals. |
| 08/22/19 | St. Louis Cardinals recalled RHP Dominic Leone from Memphis Redbirds. |
| 08/22/19 | St. Louis Cardinals optioned RHP Junior Fernandez to Memphis Redbirds. |
| 08/21/19 | St. Louis Cardinals sent LF Tyler O'Neill on a rehab assignment to Memphis Redbirds. |
| 08/20/19 | St. Louis Cardinals recalled CF Harrison Bader from Memphis Redbirds. |
| 08/20/19 | St. Louis Cardinals optioned LF Randy Arozarena to Memphis Redbirds. |
| 08/12/19 | St. Louis Cardinals selected the contract of Randy Arozarena from Memphis Redbirds. |
| 08/12/19 | St. Louis Cardinals placed RF Jose Martinez on the 10-day injured list. Right AC joint sprain. |
| 08/12/19 | St. Louis Cardinals optioned C Andrew Knizner to Memphis Redbirds. |
| 08/12/19 | St. Louis Cardinals activated C Yadier Molina from the 10-day injured list. |
| 08/11/19 | St. Louis Cardinals signed free agent CF Keshawn Rombley to a minor league contract. |
| 08/08/19 | St. Louis Cardinals sent C Yadier Molina on a rehab assignment to Springfield Cardinals. |
| 08/08/19 | Los Angeles Angels claimed LHP Adalberto Mejia off waivers from St. Louis Cardinals. |
| 08/06/19 | St. Louis Cardinals selected the contract of Junior Fernandez from Memphis Redbirds. |
| 08/06/19 | St. Louis Cardinals sent RHP Mike Mayers outright to Memphis Redbirds. |
| 08/06/19 | St. Louis Cardinals designated LHP Adalberto Mejia for assignment. |
| 08/04/19 | St. Louis Cardinals designated RHP Mike Mayers for assignment. |
| 08/04/19 | St. Louis Cardinals recalled RHP Ryan Helsley from Memphis Redbirds. |
| 08/04/19 | St. Louis Cardinals optioned 1B Rangel Ravelo to Memphis Redbirds. |
| 08/04/19 | St. Louis Cardinals activated 3B Matt Carpenter from the 10-day injured list. |
| 08/04/19 | St. Louis Cardinals activated 3B Matt Carpenter. |
| 08/04/19 | St. Louis Cardinals activated 3B Matt Carpenter. |
| 08/04/19 | St. Louis Cardinals activated 3B Matt Carpenter. |
| 08/03/19 | St. Louis Cardinals placed LF Tyler O'Neill on the 10-day injured list retroactive to August 1, 2019. Left wrist strain. |
| 08/03/19 | St. Louis Cardinals activated LF Marcell Ozuna from the 10-day injured list. |
| 08/02/19 | St. Louis Cardinals sent C Yadier Molina on a rehab assignment to Memphis Redbirds. |
| 08/01/19 | St. Louis Cardinals sent 3B Matt Carpenter on a rehab assignment to Memphis Redbirds. |