Columbia Fireflies Roster & Staff
Columbia Transactions
| Date | Transaction |
| 06/26/26 | RHP Ryan McDonagh assigned to ACL Royals from Columbia Fireflies. |
| 06/16/26 | RHP Coleman Picard assigned to Columbia Fireflies from Quad Cities River Bandits. |
| 06/16/26 | RHP Ryan McDonagh assigned to Columbia Fireflies from ACL Royals. |
| 06/15/26 | RHP Kendry Chourio assigned to Quad Cities River Bandits from Columbia Fireflies. |
| 06/14/26 | SS Connor Rasmussen assigned to Quad Cities River Bandits from Columbia Fireflies. |
| 06/09/26 | OF Angel Ramirez assigned to Columbia Fireflies from ACL Royals. |
| 06/09/26 | OF Daniel Lopez assigned to ACL Royals from Columbia Fireflies. |
| 06/01/26 | Columbia Fireflies placed C Brooks Bryan on the 7-day injured list. |