| 4/2/18 |
Arizona Diamondbacks optioned RHP Stefan Crichton to Jackson Generals. |
| 4/2/18 |
Arizona Diamondbacks sent LF Yasmany Tomas outright to Reno Aces. |
| 4/2/18 |
Baltimore Orioles traded RHP Stefan Crichton to Arizona Diamondbacks for cash. |
| 4/3/18 |
Arizona Diamondbacks placed 3B Jake Lamb on the 10-day disabled list. Left AC Joint sprain. |
| 4/3/18 |
Arizona Diamondbacks recalled Matt Koch from Reno Aces. |
| 4/6/18 |
Arizona Diamondbacks designated CF Jeremy Hazelbaker for assignment. |
| 4/6/18 |
Arizona Diamondbacks optioned RHP Troy Scribner to Reno Aces. |
| 4/6/18 |
Arizona Diamondbacks claimed RHP Troy Scribner off waivers from Los Angeles Angels. |
| 4/7/18 |
Arizona Diamondbacks sent RHP Randall Delgado on a rehab assignment to Visalia Rawhide. |
| 4/7/18 |
Arizona Diamondbacks signed LHP Robby Sexton. |
| 4/8/18 |
Arizona Diamondbacks optioned RHP Matt Koch to Reno Aces. |
| 4/8/18 |
Arizona Diamondbacks recalled 1B Christian Walker from Reno Aces. |
| 4/10/18 |
Arizona Diamondbacks traded CF Jeremy Hazelbaker to Tampa Bay Rays for cash. |
| 4/15/18 |
Arizona Diamondbacks placed RHP Taijuan Walker on the 10-day disabled list. Right forearm inflammation |
| 4/15/18 |
Arizona Diamondbacks recalled RHP Silvino Bracho from Reno Aces. |
| 4/20/18 |
Arizona Diamondbacks optioned RHP Silvino Bracho to Reno Aces. |
| 4/20/18 |
Arizona Diamondbacks traded RHP Tyler Pill to Los Angeles Dodgers for cash. |
| 4/20/18 |
Arizona Diamondbacks recalled RHP Matt Koch from Reno Aces. |
