Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 01/15/21 | St. Louis Cardinals signed free agent P Samuel Fabian. |
| 01/15/21 | St. Louis Cardinals signed free agent SS Marcelo Perez. |
| 01/15/21 | St. Louis Cardinals signed free agent SS Adari Grant. |
| 01/15/21 | St. Louis Cardinals signed free agent 3B Samil De La Rosa. |
| 01/15/21 | St. Louis Cardinals signed free agent CF Christian Avendano. |
| 01/15/21 | St. Louis Cardinals signed free agent CF Romtres Cabrera. |
| 01/15/21 | St. Louis Cardinals signed free agent SS Anyelo Encarnacion. |
| 01/15/21 | St. Louis Cardinals signed free agent P Esteban Contreras. |
| 01/15/21 | St. Louis Cardinals signed free agent CF Carlos Carmona. |
| 01/15/21 | St. Louis Cardinals signed free agent P Carlos De La Cruz. |
| 01/15/21 | St. Louis Cardinals signed free agent SS Yancel Guerrero. |
| 01/15/21 | St. Louis Cardinals signed free agent OF Robelyn Lopez. |
| 01/15/21 | St. Louis Cardinals signed free agent OF Jose Suarez. |
| 01/15/21 | St. Louis Cardinals signed free agent C Leonardo Bernal. |
| 01/15/21 | St. Louis Cardinals signed free agent SS Elias Reynoso. |
