Tigers Roster & Staff
Transactions
| Date | Transaction |
| 01/30/18 | Detroit Tigers invited non-roster RHP Paul Voelker to spring training. |
| 01/30/18 | Detroit Tigers invited non-roster RHP Victor Alcantara to spring training. |
| 01/30/18 | Detroit Tigers invited non-roster 1B Dominic Ficociello to spring training. |
| 01/30/18 | Detroit Tigers invited non-roster 3B Kody Eaves to spring training. |
| 01/30/18 | Detroit Tigers invited non-roster 2B Harold Castro to spring training. |
| 01/30/18 | Detroit Tigers invited non-roster C Jake Rogers to spring training. |
| 01/30/18 | Detroit Tigers invited non-roster C Arvicent Perez to spring training. |
| 01/30/18 | Detroit Tigers invited non-roster RHP Alex Faedo to spring training. |
| 01/30/18 | JaCoby Jones changed number to 21. |
| 01/30/18 | Mikie Mahtook changed number to . |
| 01/29/18 | Detroit Tigers signed free agent LHP Travis Wood to a minor league contract and invited him to spring training. |
| 01/24/18 | Detroit Tigers signed free agent LHP James Russell to a minor league contract. |
| 01/24/18 | Detroit Tigers signed free agent LHP Caleb Thielbar to a minor league contract. |
| 01/24/18 | Detroit Tigers signed free agent RHP Matt West to a minor league contract. |
| 01/24/18 | Detroit Tigers signed free agent SS Alexi Amarista to a minor league contract and invited him to spring training. |
| 01/19/18 | Detroit Tigers signed free agent RHP Erick Pinales to a minor league contract. |
| 01/12/18 | Detroit Tigers signed free agent RHP Williander Moreno to a minor league contract. |
| 01/12/18 | Detroit Tigers signed free agent RHP Martin Herrera to a minor league contract. |
| 01/12/18 | Detroit Tigers signed free agent RHP Dario Gardea to a minor league contract. |
| 01/11/18 | Detroit Tigers claimed RHP Johnny Barbato off waivers from Pittsburgh Pirates. |
| 01/09/18 | Detroit Tigers signed free agent OF Herlis Rodriguez to a minor league contract. |
| 01/09/18 | Detroit Tigers signed free agent C Brayan Pena to a minor league contract and invited him to spring training. |
| 01/09/18 | Detroit Tigers signed free agent SS Pete Kozma to a minor league contract and invited him to spring training. |
| 01/09/18 | Detroit Tigers signed free agent RHP Orbandy Rodriguez to a minor league contract. |
| 01/09/18 | Detroit Tigers signed free agent LHP Liarvis Breto to a minor league contract. |
| 01/09/18 | Detroit Tigers signed free agent RHP Phillippe Aumont to a minor league contract. |