Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 11/29/17 | St. Louis Cardinals signed free agent RHP Freddy Pacheco to a minor league contract. |
| 11/28/17 | St. Louis Cardinals signed free agent RHP Luis Garcia to a minor league contract. |
| 11/28/17 | St. Louis Cardinals signed free agent RHP Miguel Maiz to a minor league contract. |
| 11/20/17 | St. Louis Cardinals selected the contract of Oscar Mercado from Springfield Cardinals. |
| 11/20/17 | St. Louis Cardinals selected the contract of Derian Gonzalez from Palm Beach Cardinals. |
| 11/20/17 | St. Louis Cardinals selected the contract of Tyler O'Neill from Memphis Redbirds. |
| 11/20/17 | St. Louis Cardinals selected the contract of Austin Gomber from Springfield Cardinals. |
| 11/13/17 | St. Louis Cardinals signed free agent RHP Saniel Santana to a minor league contract. |
| 11/06/17 | St. Louis Cardinals activated RHP Alex Reyes from the 60-day disabled list. |
| 11/06/17 | St. Louis Cardinals sent 1B Alex Mejia outright to Memphis Redbirds. |
| 11/06/17 | St. Louis Cardinals released RHP Trevor Rosenthal. |
| 11/06/17 | St. Louis Cardinals sent C Alberto Rosario outright to Memphis Redbirds. |
| 11/03/17 | St. Louis Cardinals signed free agent RHP Sebastian Tabata to a minor league contract. |
| 11/02/17 | RHP Seung Hwan Oh elected free agency. |
| 11/02/17 | RHP Lance Lynn elected free agency. |
| 11/02/17 | RHP Juan Nicasio elected free agency. |
| 11/02/17 | LHP Zach Duke elected free agency. |