D-backs Roster & Staff
Transactions
| Date | Transaction |
| 11/25/20 | Boston Red Sox claimed RHP Joel Payamps off waivers from Arizona Diamondbacks. |
| 11/23/20 | Arizona Diamondbacks released RHP Junior Guerra. |
| 11/20/20 | Arizona Diamondbacks claimed RHP Rogelio Armenteros off waivers from Houston Astros. |
| 11/20/20 | Arizona Diamondbacks designated RHP Junior Guerra for assignment. |
| 11/20/20 | Arizona Diamondbacks sent 2B Domingo Leyba outright to Reno Aces. |
| 11/20/20 | Chicago White Sox claimed RHP Emilio Vargas off waivers from Arizona Diamondbacks. |
| 11/20/20 | Arizona Diamondbacks designated RHP Joel Payamps for assignment. |
| 11/20/20 | Arizona Diamondbacks selected the contract of RHP Matt Peacock from Jackson Generals. |
| 11/20/20 | Arizona Diamondbacks selected the contract of RHP Luis Frias from Kane County Cougars. |
| 11/20/20 | Arizona Diamondbacks selected the contract of RHP J.B. Bukauskas from Jackson Generals. |
| 11/20/20 | Arizona Diamondbacks selected the contract of OF Stuart Fairchild from Jackson Generals. |
| 11/20/20 | Arizona Diamondbacks selected the contract of SS Geraldo Perdomo from Jackson Generals. |
| 11/19/20 | Arizona Diamondbacks signed free agent OF Drew Weeks to a minor league contract and invited him to spring training. |
| 11/19/20 | Arizona Diamondbacks signed free agent OF Drew Weeks to a minor league contract and invited him to spring training. |
| 11/17/20 | Arizona Diamondbacks signed free agent LHP Sam Moll to a minor league contract and invited him to spring training. |
| 11/17/20 | Arizona Diamondbacks signed free agent RHP Bradley Roney to a minor league contract and invited him to spring training. |
| 11/17/20 | Arizona Diamondbacks signed free agent RHP Bradley Roney to a minor league contract and invited him to spring training. |
| 11/17/20 | Arizona Diamondbacks signed free agent P Sam Moll. |
| 11/17/20 | Arizona Diamondbacks signed free agent LHP Sam Moll to a minor league contract and invited him to spring training. |
| 11/05/20 | Chicago Cubs traded SS Ronny Simon to Arizona Diamondbacks. PTBNL in Andrew Chafin trade, 8/31/2020 |
| 11/04/20 | Arizona Diamondbacks signed free agent C Jamie Ritchie. |
| 11/04/20 | Arizona Diamondbacks signed free agent C Jamie Ritchie to a minor league contract and invited him to spring training. |
| 11/04/20 | Arizona Diamondbacks signed free agent C Jamie Ritchie to a minor league contract and invited him to spring training. |
| 11/01/20 | Arizona Diamondbacks activated RHP Jeremy Beasley from the 60-day injured list. |
| 11/01/20 | Arizona Diamondbacks activated P Merrill Kelly from the 60 day injured list. |
| 11/01/20 | Arizona Diamondbacks activated RHP Corbin Martin from the 60-day injured list. |
| 11/01/20 | Arizona Diamondbacks activated RHP Merrill Kelly from the 60-day injured list. |
| 11/01/20 | Arizona Diamondbacks activated P Merrill Kelly from the 60 day injured list. |