| 5/1/19 |
Arizona Diamondbacks signed free agent RHP Jeanpier Cova to a minor league contract. |
| 5/1/19 |
Arizona Diamondbacks signed free agent LHP Daker Tejeda to a minor league contract. |
| 5/2/19 |
Arizona Diamondbacks optioned C Caleb Joseph to Reno Aces. |
| 5/3/19 |
Arizona Diamondbacks sent RHP Matt Koch outright to Reno Aces. |
| 5/3/19 |
Arizona Diamondbacks recalled CF Tim Locastro from Reno Aces. |
| 5/7/19 |
Arizona Diamondbacks optioned CF Tim Locastro to Reno Aces. |
| 5/7/19 |
Arizona Diamondbacks recalled RHP Taylor Clarke from Reno Aces. |
| 5/9/19 |
Arizona Diamondbacks optioned RHP Taylor Clarke to Reno Aces. |
| 5/9/19 |
Arizona Diamondbacks signed free agent CF Leodany Perez to a minor league contract. |
| 5/9/19 |
Arizona Diamondbacks recalled RHP Jon Duplantier from Reno Aces. |
| 5/10/19 |
Arizona Diamondbacks signed free agent RHP Arturo Roque to a minor league contract. |
| 5/11/19 |
Arizona Diamondbacks activated C Alex Avila from the 10-day injured list. |
| 5/11/19 |
Arizona Diamondbacks optioned SS Ildemaro Vargas to Reno Aces. |
| 5/13/19 |
Arizona Diamondbacks optioned RHP Jon Duplantier to Reno Aces. |
| 5/13/19 |
Arizona Diamondbacks recalled RHP Jimmie Sherfy from Reno Aces. |
| 5/21/19 |
Arizona Diamondbacks placed 1B Wilmer Flores on the 10-day injured list retroactive to May 20, 2019. Right foot contusion. |
| 5/21/19 |
Arizona Diamondbacks recalled SS Ildemaro Vargas from Reno Aces. |
| 5/23/19 |
Arizona Diamondbacks optioned RHP Jimmie Sherfy to Reno Aces. |
