Columbia Fireflies Roster & Staff
Columbia Transactions
| Date | Transaction |
| 05/26/26 | RHP Hunter Alberini assigned to Columbia Fireflies from Quad Cities River Bandits. |
| 05/26/26 | RHP Max Martin assigned to Quad Cities River Bandits from Columbia Fireflies. |
| 05/26/26 | LHP Jordan Woods assigned to Quad Cities River Bandits from Columbia Fireflies. |
| 05/25/26 | RHP Luis Valdez assigned to Columbia Fireflies from ACL Royals. |
| 05/19/26 | Columbia Fireflies activated RHP Denis Samudio. |
| 05/19/26 | RHP Denis Samudio assigned to Columbia Fireflies from ACL Royals. |
| 05/08/26 | LHP Dash Albus assigned to Columbia Fireflies from Quad Cities River Bandits. |
| 05/08/26 | RHP Blake Wolters assigned to Quad Cities River Bandits from Columbia Fireflies. |