Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 08/31/17 | St. Louis Cardinals designated LHP Kevin Siegrist for assignment. |
| 08/31/17 | St. Louis Cardinals recalled John Gant from Memphis Redbirds. |
| 08/30/17 | St. Louis Cardinals traded RHP Mike Leake and Future Considerations to Seattle Mariners for SS Rayder Ascanio. |
| 08/30/17 | St. Louis Cardinals traded RHP Mike Leake and Future Considerations to Seattle Mariners for SS Rayder Ascanio. |
| 08/27/17 | St. Louis Cardinals recalled Luke Voit from Memphis Redbirds. |
| 08/27/17 | St. Louis Cardinals placed 3B Jedd Gyorko on the 10-day disabled list. Right hamstring strain. |
| 08/24/17 | St. Louis Cardinals sent LHP Kevin Siegrist on a rehab assignment to Palm Beach Cardinals. |
| 08/23/17 | St. Louis Cardinals selected the contract of Ryan Sherriff from Memphis Redbirds. |
| 08/23/17 | St. Louis Cardinals transferred RHP Trevor Rosenthal from the 10-day disabled list to the 60-day disabled list. Right posterior elbow irritation. |
| 08/23/17 | St. Louis Cardinals optioned RHP Josh Lucas to Memphis Redbirds. |
| 08/21/17 | St. Louis Cardinals optioned 1B Luke Voit to Memphis Redbirds. |
| 08/20/17 | St. Louis Cardinals recalled RF Stephen Piscotty from Memphis Redbirds. |
| 08/19/17 | St. Louis Cardinals optioned RHP Mike Mayers to Memphis Redbirds. |
| 08/19/17 | St. Louis Cardinals selected the contract of Josh Lucas from Memphis Redbirds. |
| 08/18/17 | St. Louis Cardinals placed RHP Adam Wainwright on the 10-day disabled list. Right elbow impingement. |
| 08/18/17 | St. Louis Cardinals recalled Mike Mayers from Memphis Redbirds. |
| 08/17/17 | St. Louis Cardinals placed RHP Trevor Rosenthal on the 10-day disabled list. Right posterior elbow irritation. |
| 08/17/17 | St. Louis Cardinals recalled RHP Luke Weaver from Memphis Redbirds. |
| 08/07/17 | St. Louis Cardinals activated RF Dexter Fowler from the 10-day disabled list. |
| 08/07/17 | St. Louis Cardinals optioned RF Stephen Piscotty to Memphis Redbirds. |
| 08/06/17 | St. Louis Cardinals activated RHP Adam Wainwright from the 10-day disabled list. |
| 08/06/17 | St. Louis Cardinals placed LHP Kevin Siegrist on the 10-day disabled list. Left forearm tendinitis |
| 08/04/17 | St. Louis Cardinals optioned RHP Luke Weaver to Memphis Redbirds. |
| 08/04/17 | St. Louis Cardinals recalled RHP Sam Tuivailala from Memphis Redbirds. |
| 08/01/17 | Stephen Piscotty roster status changed by St. Louis Cardinals. |
| 08/01/17 | St. Louis Cardinals signed free agent RHP Jason Zgardowski to a minor league contract. |