Great Lakes Loons Roster & Staff
Great Lakes Transactions
| Date | Transaction |
| 08/31/25 | Great Lakes Loons activated RHP Christian Zazueta. |
| 08/28/25 | Great Lakes Loons placed SS Jordan Thompson on the 7-day injured list. |
| 08/28/25 | LHP Sterling Patick assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 08/25/25 | Great Lakes Loons placed RHP Payton Martin on the 7-day injured list. |
| 08/21/25 | Great Lakes Loons released C Carlos Rojas. |
| 08/21/25 | C Gio Cueto assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 08/16/25 | Great Lakes Loons activated CF Josue De Paula from the 7-day injured list. |
| 08/15/25 | Great Lakes Loons transferred RHP Christian Zazueta to the Development List. |
| 08/14/25 | LHP Wyatt Crowell assigned to Tulsa Drillers from Great Lakes Loons. |
| 08/14/25 | RHP Aidan Foeller assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 08/14/25 | LHP Wyatt Crowell assigned to Tulsa Drillers from Great Lakes Loons. |
| 08/12/25 | RHP Christian Zazueta assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 08/10/25 | RHP Logan Tabeling assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 08/08/25 | Great Lakes Loons released RHP Jorge Gonzalez. |
| 08/08/25 | RHP Ryan Brown assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 08/06/25 | Great Lakes Loons released SS Wilman Diaz. |
| 08/06/25 | Great Lakes Loons activated 1B Samuel Munoz. |
| 08/06/25 | 1B Samuel Munoz assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 08/05/25 | RHP Christian Romero assigned to Oklahoma City Comets from Great Lakes Loons. |
| 08/02/25 | Great Lakes Loons activated LHP Adam Serwinowski. |
| 08/02/25 | RHP Christian Romero assigned to Great Lakes Loons from Oklahoma City Comets. |