Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 05/31/19 | St. Louis Cardinals placed C Yadier Molina on the 10-day injured list retroactive to May 29, 2019. Right thumb tendon strain. |
| 05/31/19 | St. Louis Cardinals selected the contract of Andrew Knizner from Memphis Redbirds. |
| 05/29/19 | St. Louis Cardinals recalled Genesis Cabrera from Memphis Redbirds. |
| 05/29/19 | St. Louis Cardinals optioned CF Lane Thomas to Memphis Redbirds. |
| 05/23/19 | St. Louis Cardinals optioned RHP Ryan Helsley to Memphis Redbirds. |
| 05/22/19 | St. Louis Cardinals recalled Lane Thomas from Memphis Redbirds. |
| 05/20/19 | St. Louis Cardinals released RHP Luke Gregerson. |
| 05/17/19 | St. Louis Cardinals activated RHP Carlos Martinez from the 10-day injured list. |
| 05/17/19 | St. Louis Cardinals optioned RHP Dominic Leone to Memphis Redbirds. |
| 05/17/19 | St. Louis Cardinals designated RHP Luke Gregerson for assignment. |
| 05/17/19 | St. Louis Cardinals recalled Ryan Helsley from Memphis Redbirds. |
| 05/15/19 | St. Louis Cardinals sent RHP Carlos Martinez on a rehab assignment to Springfield Cardinals. |
| 05/09/19 | St. Louis Cardinals signed free agent LHP Hemerson Corder to a minor league contract. |
| 05/08/19 | St. Louis Cardinals sent RHP Carlos Martinez on a rehab assignment to Memphis Redbirds. |
| 05/05/19 | St. Louis Cardinals sent RHP Carlos Martinez on a rehab assignment to Peoria Chiefs. |
| 05/05/19 | St. Louis Cardinals optioned LF Justin Williams to Springfield Cardinals. |
| 05/04/19 | St. Louis Cardinals activated RHP Luke Gregerson from the 10-day injured list. |
| 05/04/19 | St. Louis Cardinals optioned LF Tyler O'Neill to Memphis Redbirds. |
| 05/02/19 | St. Louis Cardinals traded C Francisco Pena to San Francisco Giants for cash. |