Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 12/21/23 | St. Louis Cardinals signed free agent 3B Gavin Collins to a minor league contract. |
| 12/20/23 | OF Matt Lloyd assigned to St. Louis Cardinals. |
| 12/15/23 | St. Louis Cardinals signed free agent RHP Alan Reyes to a minor league contract. |
| 12/08/23 | St. Louis Cardinals traded LF Tyler O'Neill to Boston Red Sox for RHP Nick Robertson and RHP Victor Santos. |
| 12/08/23 | St. Louis Cardinals traded LF Tyler O'Neill to Boston Red Sox for RHP Nick Robertson and RHP Victor Santos. |
| 12/08/23 | St. Louis Cardinals traded LF Tyler O'Neill to Boston Red Sox for RHP Nick Robertson and RHP Victor Santos. |
| 12/06/23 | St. Louis Cardinals drafted RHP Ryan Fernandez. |