| 12/1/17 |
RHP Bruce Rondon elected free agency. |
| 12/5/17 |
Detroit Tigers signed free agent RF Jim Adduci to a minor league contract and invited him to spring training. |
| 12/5/17 |
Detroit Tigers signed free agent 1B Edwin Espinal to a minor league contract and invited him to spring training. |
| 12/5/17 |
Detroit Tigers signed free agent C Derek Norris to a minor league contract and invited him to spring training. |
| 12/5/17 |
Detroit Tigers signed free agent RHP Enrique Burgos to a minor league contract and invited him to spring training. |
| 12/5/17 |
Detroit Tigers signed free agent CF Leonys Martin. |
| 12/8/17 |
Detroit Tigers signed free agent RHP Mike Fiers. |
| 12/11/17 |
Detroit Tigers sent RHP Victor Alcantara outright to Toledo Mud Hens. |
| 12/13/17 |
Los Angeles Angels traded OF Troy Montgomery and RHP Wilkel Hernandez to Detroit Tigers for 2B Ian Kinsler. |
| 12/14/17 |
Detroit Tigers claimed LF Victor Reyes off waivers from Jackson Generals. |
| 12/21/17 |
Detroit Tigers signed free agent LF Jason Krizan to a minor league contract and invited him to spring training. |
| 12/21/17 |
Detroit Tigers signed free agent 2B Ronny Rodriguez to a minor league contract and invited him to spring training. |
| 12/21/17 |
Detroit Tigers signed free agent LHP Will Lamb to a minor league contract. |
| 12/21/17 |
Detroit Tigers signed free agent CF Kenny Wilson to a minor league contract. |
