Reds Roster & Staff
Transactions
| Date | Transaction |
| 01/30/21 | Cincinnati Reds traded cash to Philadelphia Phillies for SS Kyle Holder. |
| 01/27/21 | Cincinnati Reds signed free agent RHP Karsen Lindell to a minor league contract. |
| 01/25/21 | Cincinnati Reds signed free agent RHP Walker Weickel to a minor league contract. |
| 01/23/21 | Houston Astros traded LHP Cionel Perez to Cincinnati Reds for C Luke Berryhill. |
| 01/23/21 | Houston Astros traded LHP Cionel Perez to Cincinnati Reds for C Luke Berryhill. |
| 01/22/21 | Toronto Blue Jays traded RHP Hector Perez to Cincinnati Reds for Player To Be Named Later. |
| 01/19/21 | Cincinnati Reds signed free agent P Brian Marcano. |
| 01/18/21 | Cincinnati Reds signed free agent C Rocky Gale to a minor league contract and invited him to spring training. |
| 01/18/21 | Cincinnati Reds signed free agent C Rocky Gale. |
| 01/17/21 | Cincinnati Reds signed free agent P Juan Martinez. |
| 01/15/21 | Cincinnati Reds signed free agent SS Jose Serrano to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent OF Brayan Rijo to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent SS Carlos Jorge to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent RHP Raynardo Cruz to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent IF Luis Reyes to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent RHP Alejandro Rodriguez to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent C Eddy Isturiz to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent LHP Cristian Galindo to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent OF Ariel Almonte to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent SS Leonardo Balcazar to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent OF Malvin Valdez to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent C Diego Omana to a minor league contract. |
| 01/15/21 | Cincinnati Reds signed free agent RHP Luis Castro to a minor league contract. |
| 01/07/21 | Cincinnati Reds signed free agent RHP Peter Bayer to a minor league contract. |
| 01/06/21 | Texas Rangers traded RHP Art Warren to Cincinnati Reds for cash. |