Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 07/28/26 | St. Louis Cardinals selected the contract of RHP Peter Strzelecki from Palm Beach Cardinals. |
| 07/28/26 | St. Louis Cardinals optioned RHP Hunter Dobbins to Memphis Redbirds. |
| 07/27/26 | St. Louis Cardinals signed RHP Cal Randall. |
| 07/27/26 | St. Louis Cardinals signed SS Rocco Maniscalco. |
| 07/27/26 | St. Louis Cardinals signed RHP Tegan Kuhns. |
| 07/26/26 | St. Louis Cardinals traded RHP Scott Blewett to Athletics for cash. |
| 07/25/26 | St. Louis Cardinals signed free agent RHP Peter Strzelecki to a minor league contract. |
| 07/25/26 | St. Louis Cardinals sent 3B Ramón Urías on a rehab assignment to Memphis Redbirds. |
| 07/24/26 | St. Louis Cardinals signed free agent C Eduardo Mirabal to a minor league contract. |
| 07/23/26 | Baltimore Orioles claimed C Yohel Pozo off waivers from St. Louis Cardinals. |
| 07/22/26 | St. Louis Cardinals designated RHP Scott Blewett for assignment. |
| 07/22/26 | St. Louis Cardinals recalled RHP Hunter Dobbins from Memphis Redbirds. |
| 07/18/26 | St. Louis Cardinals signed free agent RHP Drew Horn to a minor league contract. |
| 07/17/26 | St. Louis Cardinals signed 3B Jacob Johnson. |
| 07/17/26 | St. Louis Cardinals signed free agent C John Lemm to a minor league contract. |
| 07/17/26 | St. Louis Cardinals signed free agent RHP JR Fordham to a minor league contract. |
| 07/17/26 | St. Louis Cardinals signed SS Dee Kennedy. |
| 07/17/26 | St. Louis Cardinals signed RHP Derek Schaefer. |
| 07/17/26 | St. Louis Cardinals signed free agent OF Tristan Bissetta to a minor league contract. |
| 07/17/26 | St. Louis Cardinals signed OF Gabe Camacho. |
| 07/17/26 | St. Louis Cardinals signed RHP Jacob Haley. |
| 07/17/26 | St. Louis Cardinals signed OF Matthew Thomas. |
| 07/17/26 | St. Louis Cardinals signed SS Owen Henne. |
| 07/17/26 | St. Louis Cardinals designated C Yohel Pozo for assignment. |
| 07/17/26 | St. Louis Cardinals placed LHP JoJo Romero on the 15-day injured list retroactive to July 14, 2026. |
| 07/17/26 | St. Louis Cardinals signed RHP Jaden Alba. |
| 07/17/26 | St. Louis Cardinals signed RHP Nick Bonn. |
| 07/17/26 | St. Louis Cardinals signed free agent RHP Hunter Baynes to a minor league contract. |
| 07/17/26 | St. Louis Cardinals signed RHP Dallis Moran. |
| 07/17/26 | Tampa Bay Rays traded RHP Trey Pooser to St. Louis Cardinals. Player To Be Named Later from 6/23 Chris Roycroft trade. |
| 07/17/26 | St. Louis Cardinals selected the contract of RHP Scott Blewett from Memphis Redbirds. |
| 07/16/26 | St. Louis Cardinals signed OF Trevor Condon. |
| 07/16/26 | St. Louis Cardinals signed RHP Brian Garmon. |
| 07/16/26 | St. Louis Cardinals signed OF Caden Ferraro. |
| 07/16/26 | St. Louis Cardinals signed free agent RHP Rayner Reyes to a minor league contract. |
| 07/16/26 | St. Louis Cardinals signed C Jayden Lobliner. |
| 07/16/26 | St. Louis Cardinals signed OF Andrew Williamson. |
| 07/16/26 | St. Louis Cardinals signed RHP Dawson Montesa. |
| 07/12/26 | St. Louis Cardinals sent LHP Bruce Zimmermann outright to Memphis Redbirds. |
| 07/10/26 | St. Louis Cardinals sent LHP Jared Shuster outright to Memphis Redbirds. |
| 07/10/26 | St. Louis Cardinals obtain RHP Durbin Feltman from Kansas City Monarchs. |
| 07/09/26 | RHP Durbin Feltman assigned to St. Louis Cardinals. |
| 07/08/26 | St. Louis Cardinals designated LHP Jared Shuster for assignment. |
| 07/08/26 | St. Louis Cardinals selected the contract of RHP Luis Gastelum from Memphis Redbirds. |
| 07/08/26 | St. Louis Cardinals optioned RHP Hunter Dobbins to Memphis Redbirds. |
| 07/07/26 | St. Louis Cardinals designated LHP Bruce Zimmermann for assignment. |
| 07/07/26 | St. Louis Cardinals transferred RHP Max Rajcic from the 15-day injured list to the 60-day injured list. Right elbow soreness. |
| 07/07/26 | St. Louis Cardinals recalled RHP Hunter Dobbins from Memphis Redbirds. |
| 07/07/26 | St. Louis Cardinals selected the contract of LHP Bruce Zimmermann from Memphis Redbirds. |
| 07/07/26 | St. Louis Cardinals optioned RHP Ryan Fernandez to Memphis Redbirds. |
| 07/07/26 | St. Louis Cardinals selected the contract of LHP Jared Shuster from Memphis Redbirds. |
| 07/06/26 | St. Louis Cardinals placed RHP Max Rajcic on the 15-day injured list retroactive to July 4, 2026. Right elbow soreness. |
| 07/06/26 | St. Louis Cardinals recalled RHP Gordon Graceffo from Memphis Redbirds. |
| 07/03/26 | St. Louis Cardinals activated RHP Ryne Stanek from the paternity list. |
| 07/03/26 | St. Louis Cardinals optioned RHP Gordon Graceffo to Memphis Redbirds. |