Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 07/31/17 | St. Louis Cardinals optioned CF Harrison Bader to Memphis Redbirds. |
| 07/27/17 | St. Louis Cardinals recalled Luke Weaver from Memphis Redbirds. |
| 07/27/17 | St. Louis Cardinals optioned RHP Mike Mayers to Memphis Redbirds. |
| 07/27/17 | St. Louis Cardinals sent OF Stephen Piscotty on a rehab assignment to Peoria Chiefs. |
| 07/26/17 | St. Louis Cardinals recalled Mike Mayers from Memphis Redbirds. |
| 07/25/17 | St. Louis Cardinals placed RHP Adam Wainwright on the 10-day disabled list retroactive to July 23, 2017. Mid-back tightness. |
| 07/25/17 | St. Louis Cardinals sent 1B Chad Huffman outright to State College Spikes. |
| 07/25/17 | St. Louis Cardinals selected the contract of Harrison Bader from Memphis Redbirds. |
| 07/25/17 | St. Louis Cardinals placed CF Dexter Fowler on the 10-day disabled list. Left wrist strain. |
| 07/24/17 | St. Louis Cardinals signed free agent RHP Zach Prendergast to a minor league contract. |
| 07/24/17 | St. Louis Cardinals sent C Eric Fryer outright to Memphis Redbirds. |
| 07/21/17 | St. Louis Cardinals traded LHP Marco Gonzales to Seattle Mariners for RF Tyler O'Neill. |
| 07/21/17 | St. Louis Cardinals traded LHP Marco Gonzales to Seattle Mariners for RF Tyler O'Neill. |
| 07/21/17 | St. Louis Cardinals activated LF Randal Grichuk from the 10-day disabled list. |
| 07/21/17 | St. Louis Cardinals optioned RHP Sam Tuivailala to Memphis Redbirds. |
| 07/21/17 | St. Louis Cardinals optioned RF Magneuris Sierra to Springfield Cardinals. |
| 07/21/17 | St. Louis Cardinals recalled C Carson Kelly from Memphis Redbirds. |
| 07/21/17 | St. Louis Cardinals designated C Eric Fryer for assignment. |
| 07/21/17 | St. Louis Cardinals activated LHP Zach Duke from the 60-day disabled list. |
| 07/19/17 | St. Louis Cardinals sent LF Randal Grichuk on a rehab assignment to Springfield Cardinals. |
| 07/15/17 | St. Louis Cardinals recalled Magneuris Sierra from Springfield Cardinals. |
| 07/15/17 | St. Louis Cardinals placed RF Stephen Piscotty on the 10-day disabled list. Strained right groin. |
| 07/14/17 | St. Louis Cardinals recalled LF Jose Martinez from Memphis Redbirds. |
| 07/14/17 | St. Louis Cardinals placed LF Randal Grichuk on the 10-day disabled list retroactive to July 10, 2017. Lower back strain. |
| 07/13/17 | St. Louis Cardinals activated LHP Kevin Siegrist from the 10-day disabled list. |
| 07/10/17 | St. Louis Cardinals optioned RHP Luke Weaver to Memphis Redbirds. |
| 07/10/17 | St. Louis Cardinals optioned 2B Alex Mejia to Memphis Redbirds. |
| 07/10/17 | St. Louis Cardinals traded RF Todd Cunningham to Los Angeles Dodgers for cash. |
| 07/10/17 | St. Louis Cardinals activated 2B Kolten Wong from the 10-day disabled list. |
| 07/07/17 | St. Louis Cardinals signed free agent 3B Francisco Hernandez to a minor league contract. |
| 07/07/17 | St. Louis Cardinals sent LHP Kevin Siegrist on a rehab assignment to Springfield Cardinals. |
| 07/07/17 | St. Louis Cardinals sent LHP Zach Duke on a rehab assignment to Memphis Redbirds. |
| 07/07/17 | St. Louis Cardinals optioned 1B Jose Martinez to Memphis Redbirds. |
| 07/07/17 | St. Louis Cardinals activated CF Dexter Fowler from the 10-day disabled list. |
| 07/05/17 | St. Louis Cardinals sent 2B Kolten Wong on a rehab assignment to Springfield Cardinals. |
| 07/04/17 | St. Louis Cardinals sent LHP Zach Duke on a rehab assignment to Palm Beach Cardinals. |
| 07/03/17 | St. Louis Cardinals optioned RHP Mike Mayers to Memphis Redbirds. |
| 07/03/17 | St. Louis Cardinals recalled Luke Weaver from Memphis Redbirds. |
| 07/02/17 | St. Louis Cardinals signed 2B Kramer Robertson. |
| 07/02/17 | St. Louis Cardinals signed free agent RHP Jesus Cruz to a minor league contract. |
| 07/02/17 | Boston Red Sox traded SS Imeldo Diaz and 3B Stanley Espinal to St. Louis Cardinals for Other Considerations. |
| 07/02/17 | Boston Red Sox traded SS Imeldo Diaz and 3B Stanley Espinal to St. Louis Cardinals for Other Considerations. |
| 07/02/17 | St. Louis Cardinals signed free agent SS Darlyn Del Villar to a minor league contract. |
| 07/02/17 | St. Louis Cardinals signed free agent SS Sander Mora to a minor league contract. |
| 07/02/17 | St. Louis Cardinals signed free agent OF Leudy Pena to a minor league contract. |
| 07/02/17 | St. Louis Cardinals signed free agent OF Joerlin De Los Santos to a minor league contract. |
| 07/02/17 | St. Louis Cardinals signed free agent OF Gustavo Rodriguez to a minor league contract. |
| 07/02/17 | St. Louis Cardinals signed 3B Donivan Williams. |
| 07/02/17 | St. Louis Cardinals signed free agent C Jose Zapata to a minor league contract. |
| 07/02/17 | Toronto Blue Jays traded CF Lane Thomas to St. Louis Cardinals for Other Considerations. |
| 07/02/17 | St. Louis Cardinals signed RHP Wilberto Rivera. |
| 07/02/17 | St. Louis Cardinals signed free agent C Jesus Orecchia to a minor league contract. |
| 07/02/17 | St. Louis Cardinals signed free agent C Luis Rodriguez to a minor league contract. |
| 07/02/17 | St. Louis Cardinals signed free agent OF Adanson Cruz to a minor league contract. |