Great Lakes Loons Roster & Staff
Great Lakes Transactions
| Date | Transaction |
| 05/25/23 | Great Lakes Loons activated RHP Hyun-il Choi. |
| 05/25/23 | Great Lakes Loons activated RHP Yon Castro. |
| 05/25/23 | RHP Hyun-il Choi assigned to Great Lakes Loons from ACL Dodgers. |
| 05/25/23 | RHP Antonio Knowles assigned to Tulsa Drillers from Great Lakes Loons. |
| 05/25/23 | RHP Ben Casparius assigned to Tulsa Drillers from Great Lakes Loons. |
| 05/17/23 | Great Lakes Loons transferred RHP Yon Castro to the Development List. |
| 05/17/23 | Great Lakes Loons activated LHP Benony Robles. |
| 05/11/23 | Great Lakes Loons activated C Frank Rodriguez. |
| 05/11/23 | Great Lakes Loons placed OF Yunior Garcia on the 7-day injured list. |
| 05/11/23 | LHP Maddux Bruns assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 05/11/23 | C Frank Rodriguez assigned to Great Lakes Loons from ACL Dodgers. |
| 05/10/23 | RHP Jerming Rosario assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 05/09/23 | Great Lakes Loons released LHP Julian Smith. |
| 05/09/23 | RHP Jake Pilarski assigned to Tulsa Drillers from Great Lakes Loons. |
| 05/04/23 | Great Lakes Loons placed RHP Adolfo Ramirez on the 7-day injured list. |
| 05/04/23 | Great Lakes Loons activated RHP Antonio Knowles from the temporarily inactive list. |
| 05/03/23 | Great Lakes Loons transferred LHP Benony Robles to the Development List. |
| 05/02/23 | Great Lakes Loons activated RHP Juan Morillo. |
| 05/02/23 | Great Lakes Loons placed RHP Antonio Knowles on the temporarily inactive list. |
| 05/02/23 | RHP Carlos De Los Santos assigned to Great Lakes Loons. |
| 05/02/23 | RHP Juan Morillo assigned to Great Lakes Loons from Rancho Cucamonga Quakes. |
| 05/02/23 | RHP Carlos De Los Santos assigned to Great Lakes Loons from ACL Dodgers. |