Great Lakes Loons Roster & Staff
Great Lakes Transactions
| Date | Transaction |
| 07/31/25 | LHP Adam Serwinowski assigned to Great Lakes Loons. |
| 07/29/25 | RHP Christian Romero assigned to Oklahoma City Comets from Great Lakes Loons. |
| 07/26/25 | Great Lakes Loons activated RHP Sean Paul Liñan from the 7-day injured list. |
| 07/26/25 | Great Lakes Loons placed CF Josue De Paula on the 7-day injured list. |
| 07/25/25 | OF Eduardo Quintero assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 07/23/25 | Great Lakes Loons placed RHP Sean Paul Liñan on the 7-day injured list. |
| 07/23/25 | RHP Carson Hobbs assigned to Tulsa Drillers from Great Lakes Loons. |
| 07/23/25 | LHP Luke Fox assigned to Tulsa Drillers from Great Lakes Loons. |
| 07/23/25 | RHP Nicolas Cruz assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 07/23/25 | LHP Luke Fox assigned to Tulsa Drillers from Great Lakes Loons. |
| 07/23/25 | RHP Carson Hobbs assigned to Tulsa Drillers from Great Lakes Loons. |
| 07/18/25 | Great Lakes Loons activated CF Josue De Paula from the temporarily inactive list. |
| 07/18/25 | Great Lakes Loons activated CF Zyhir Hope. |
| 07/18/25 | C Nelson Quiroz assigned to Tulsa Drillers from Great Lakes Loons. |
| 07/18/25 | C Nelson Quiroz assigned to Tulsa Drillers from Great Lakes Loons. |
| 07/13/25 | Great Lakes Loons activated LHP Luke Fox from the 7-day injured list. |
| 07/13/25 | Great Lakes Loons transferred CF Mike Sirota from the 7-day injured list to the 60-day injured list. |
| 07/13/25 | Great Lakes Loons transferred RHP Noah Ruen from the 7-day injured list to the 60-day injured list. |
| 07/11/25 | Great Lakes Loons placed CF Zyhir Hope on the temporarily inactive list. |
| 07/11/25 | Great Lakes Loons placed CF Josue De Paula on the temporarily inactive list. |
| 07/11/25 | SS Elijah Hainline assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 07/08/25 | LHP Myles Caba assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 07/06/25 | Great Lakes Loons activated C Nelson Quiroz from the 7-day injured list. |
| 07/04/25 | SS Cameron Decker assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 07/04/25 | OF Kyle Nevin assigned to Tulsa Drillers from Great Lakes Loons. |
| 07/04/25 | OF Kyle Nevin assigned to Tulsa Drillers from Great Lakes Loons. |
| 07/01/25 | RHP Roque Gutierrez assigned to Tulsa Drillers from Great Lakes Loons. |
| 07/01/25 | RHP Roque Gutierrez assigned to Tulsa Drillers from Great Lakes Loons. |