Reds Roster & Staff
Transactions
| Date | Transaction |
| 12/30/19 | Cincinnati Reds signed free agent RHP Tyler Thornburg to a minor league contract and invited him to spring training. |
| 12/21/19 | Cincinnati Reds signed free agent OF Boog Powell to a minor league contract and invited him to spring training. |
| 12/18/19 | Cincinnati Reds signed free agent LHP Wade Miley. |
| 12/16/19 | Cincinnati Reds signed free agent RHP David Carpenter to a minor league contract and invited him to spring training. |
| 12/12/19 | Cincinnati Reds claimed LF Mark Payton off waivers from Las Vegas Aviators. |
| 12/10/19 | Cincinnati Reds signed free agent C Francisco Pena to a minor league contract and invited him to spring training. |
| 12/09/19 | Cincinnati Reds sent RHP R.J. Alaniz outright to Louisville Bats. |
| 12/06/19 | Cincinnati Reds signed free agent RHP Dylan Rheault to a minor league contract. |
| 12/05/19 | Cincinnati Reds signed free agent 2B Mike Moustakas. |
| 12/02/19 | Texas Rangers claimed RHP Jimmy Herget off waivers from Cincinnati Reds. |
| 12/02/19 | 2B Jose Peraza elected free agency. |
| 12/02/19 | RHP Kevin Gausman elected free agency. |