Peoria Chiefs Roster & Staff
STL Transactions
| Date | Transaction |
| 12/22/25 | RHP Yhoiker Fajardo assigned to Palm Beach Cardinals. |
| 12/22/25 | RHP Blake Aita assigned to Peoria Chiefs. |
| 12/19/25 | St. Louis Cardinals sent LF Matt Koperniak outright to Memphis Redbirds. |
| 12/11/25 | DSL Cardinals released RHP Pedro Olivero. |
| 12/10/25 | RHP Ryan Murphy assigned to Memphis Redbirds. |