Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 12/10/25 | New York Yankees purchased contract of RHP Cade Winquest in the Rule 5 Draft. |
| 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 | St. Louis Cardinals purchased contract of RHP Ryan Murphy 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 | Boston Red Sox purchased contract of 3B Matt Lloyd in the Rule 5 Draft, AAA Phase. |
| 12/05/25 | St. Louis Cardinals claimed RHP Zak Kent off waivers from Cleveland Guardians. |