Tigers Roster & Staff
Transactions
| Date | Transaction |
| 12/19/18 | Detroit Tigers signed free agent LHP Nick Ramirez to a minor league contract. |
| 12/19/18 | Detroit Tigers signed free agent RHP Eduardo Paredes to a minor league contract and invited him to spring training. |
| 12/19/18 | Detroit Tigers signed free agent RHP Chris Smith to a minor league contract and invited him to spring training. |
| 12/18/18 | Detroit Tigers signed free agent RHP Alfredo Raciel to a minor league contract. |
| 12/18/18 | Detroit Tigers signed free agent RHP Daniele Di Monte to a minor league contract. |
| 12/18/18 | Detroit Tigers signed free agent RHP Juan Cordero to a minor league contract. |
| 12/14/18 | Detroit Tigers signed free agent SS Jordy Mercer. |
| 12/13/18 | Detroit Tigers claimed RHP Reed Garrett off waivers from Nashville Sounds. |
| 12/13/18 | Detroit Tigers traded Tyler Hill to New York Yankees for cash. |
| 12/10/18 | San Francisco Giants claimed CF Mike Gerber off waivers from Detroit Tigers. |
| 12/10/18 | Detroit Tigers signed free agent RHP Tyson Ross. |
| 12/05/18 | Detroit Tigers signed free agent RHP Louis Coleman to a minor league contract and invited him to spring training. |
| 12/05/18 | Detroit Tigers signed free agent 3B Kody Eaves to a minor league contract and invited him to spring training. |
| 12/05/18 | Detroit Tigers signed free agent C Kade Scivicque to a minor league contract and invited him to spring training. |
| 12/05/18 | Detroit Tigers signed free agent C Bobby Wilson to a minor league contract and invited him to spring training. |
| 12/04/18 | Detroit Tigers signed free agent LHP Matt Moore. |