Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 12/22/25 | St. Louis Cardinals signed free agent LHP Jared Shuster to a minor league contract. |
| 12/22/25 | St. Louis Cardinals activated RHP Hunter Dobbins. |
| 12/22/25 | Boston Red Sox traded RHP Hunter Dobbins, RHP Yhoiker Fajardo and RHP Blake Aita to St. Louis Cardinals for 1B Willson Contreras. |
| 12/22/25 | Boston Red Sox traded RHP Hunter Dobbins, RHP Yhoiker Fajardo and RHP Blake Aita to St. Louis Cardinals for 1B Willson Contreras. |
| 12/22/25 | Boston Red Sox traded RHP Hunter Dobbins, RHP Yhoiker Fajardo and RHP Blake Aita to St. Louis Cardinals for 1B Willson Contreras. |
| 12/22/25 | Boston Red Sox traded RHP Hunter Dobbins, RHP Yhoiker Fajardo and RHP Blake Aita to St. Louis Cardinals for 1B Willson Contreras. |
| 12/19/25 | St. Louis Cardinals sent LF Matt Koperniak outright to Memphis Redbirds. |
| 12/17/25 | St. Louis Cardinals signed free agent RHP Dustin May. |
| 12/17/25 | St. Louis Cardinals designated LF Matt Koperniak for assignment. |
| 12/13/25 | St. Louis Cardinals signed free agent IF Diego Consecion to a minor league contract. |
| 12/10/25 | St. Louis Cardinals activated RHP Matt Pushard. |
| 12/10/25 | St. Louis Cardinals purchased contract of RHP Ryan Murphy in the Rule 5 Draft, AAA Phase. |
| 12/10/25 | Chicago Cubs purchased contract of RHP Zane Mills in the Rule 5 Draft, AAA Phase. |
| 12/10/25 | St. Louis Cardinals purchased contract of RHP Matt Pushard in the Rule 5 Draft. |
| 12/10/25 | Boston Red Sox purchased contract of 3B Matt Lloyd in the Rule 5 Draft, AAA Phase. |
| 12/10/25 | Arizona Diamondbacks purchased contract of RHP Sean Harney in the Rule 5 Draft, AAA Phase. |
| 12/10/25 | New York Yankees purchased contract of RHP Cade Winquest in the Rule 5 Draft. |
| 12/05/25 | St. Louis Cardinals claimed RHP Zak Kent off waivers from Cleveland Guardians. |