D-backs Roster & Staff
Transactions
| Date | Transaction |
| 08/20/26 | Arizona Diamondbacks activated 2B Ketel Marte from the restricted list. |
| 08/20/26 | Arizona Diamondbacks placed 2B Ketel Marte on the 10-day injured list. Left knee inflammation. |
| 08/20/26 | Arizona Diamondbacks signed free agent 3B Santiago Espinal to a minor league contract. |
| 08/20/26 | Philadelphia Phillies claimed RHP Andrew Hoffmann off waivers from Arizona Diamondbacks. |
| 08/19/26 | San Francisco Giants claimed LHP Philip Abner off waivers from Arizona Diamondbacks. |
| 08/18/26 | Arizona Diamondbacks sent LF Lourdes Gurriel Jr. on a rehab assignment to Reno Aces. |
| 08/17/26 | Arizona Diamondbacks activated RHP Justin Martinez from the 60-day injured list. |
| 08/17/26 | Arizona Diamondbacks activated LF Jordan Lawlar from the 10-day injured list. |
| 08/17/26 | Arizona Diamondbacks designated RHP Andrew Hoffmann for assignment. |
| 08/17/26 | Arizona Diamondbacks placed 2B Ketel Marte on the restricted list. |
| 08/17/26 | Arizona Diamondbacks optioned 1B Tyler Locklear to Reno Aces. |
| 08/17/26 | Arizona Diamondbacks optioned RHP Gerardo Carrillo to Reno Aces. |
| 08/17/26 | Arizona Diamondbacks recalled DH Jose Fernandez from Reno Aces. |
| 08/16/26 | Arizona Diamondbacks designated LHP Philip Abner for assignment. |
| 08/16/26 | Arizona Diamondbacks selected the contract of RHP Dennis Santana from Reno Aces. |
| 08/15/26 | Arizona Diamondbacks sent RHP Drey Jameson on a rehab assignment to Reno Aces. |
| 08/12/26 | Toronto Blue Jays claimed RHP Paul Sewald off waivers from Arizona Diamondbacks. |
| 08/11/26 | Arizona Diamondbacks sent RHP Justin Martinez on a rehab assignment to Reno Aces. |
| 08/11/26 | Arizona Diamondbacks sent RHP Justin Martinez on a rehab assignment to Reno Aces. |
| 08/10/26 | Arizona Diamondbacks signed free agent RHP Zack Littell. |
| 08/10/26 | Arizona Diamondbacks designated RHP Paul Sewald for assignment. |
| 08/10/26 | Arizona Diamondbacks optioned RHP Kade Strowd to Reno Aces. |
| 08/07/26 | Arizona Diamondbacks recalled RHP Kade Strowd from Reno Aces. |
| 08/07/26 | Arizona Diamondbacks optioned LHP Kohl Drake to Reno Aces. |
| 08/05/26 | Arizona Diamondbacks placed RHP Ryan Thompson on the 15-day injured list. Strained lower back. |
| 08/05/26 | Arizona Diamondbacks activated C Gabriel Moreno from the paternity list. |
| 08/05/26 | Arizona Diamondbacks signed free agent RHP Dennis Santana to a minor league contract. |
| 08/05/26 | Arizona Diamondbacks recalled LHP Philip Abner from Reno Aces. |
| 08/05/26 | Arizona Diamondbacks optioned DH Adrian Del Castillo to Reno Aces. |
| 08/04/26 | Arizona Diamondbacks sent RHP Justin Martinez on a rehab assignment to Visalia Rawhide. |
| 08/04/26 | Arizona Diamondbacks sent LHP Blake Walston on a rehab assignment to Reno Aces. |
| 08/04/26 | Arizona Diamondbacks sent RHP Justin Martinez on a rehab assignment to Visalia Rawhide. |
| 08/04/26 | Arizona Diamondbacks placed C Gabriel Moreno on the paternity list. |
| 08/04/26 | Arizona Diamondbacks activated LF Lars Nootbaar. |
| 08/04/26 | Arizona Diamondbacks sent LF Jordan Lawlar on a rehab assignment to Amarillo Sod Poodles. |
| 08/04/26 | Arizona Diamondbacks sent LF Jordan Lawlar on a rehab assignment to Amarillo Sod Poodles. |
| 08/04/26 | Arizona Diamondbacks sent RHP Michael Soroka on a rehab assignment to Reno Aces. |
| 08/03/26 | Arizona Diamondbacks transferred RHP Zac Gallen from the 15-day injured list to the 60-day injured list. Right elbow inflammation. |
| 08/03/26 | LF Lars Nootbaar roster status changed by Arizona Diamondbacks. |
| 08/03/26 | St. Louis Cardinals traded LF Lars Nootbaar to Arizona Diamondbacks for RHP Daniel Eagen, LHP Sandro Santana and Player To Be Named Later. |
| 08/03/26 | St. Louis Cardinals traded LF Lars Nootbaar to Arizona Diamondbacks for RHP Daniel Eagen, LHP Sandro Santana and Player To Be Named Later. |
| 08/03/26 | St. Louis Cardinals traded LF Lars Nootbaar to Arizona Diamondbacks for RHP Daniel Eagen, LHP Sandro Santana and Player To Be Named Later. |