| Player | Team | Action | Details | |
|---|---|---|---|---|
| Derek Dietrich | Bridge Four | ADD | to MLB | 7:16 am, 5/13/18 |
| John Hicks | Bridge Four | ADD | to MLB | 7:14 am, 5/13/18 |
| Brandon Crawford | Bridge Four | ADD | to MLB | 7:11 am, 5/13/18 |
| Jon Jay | Bridge Four | ADD | to MLB | 7:09 am, 5/13/18 |
| David Hess | Purple Cobras | ADD | to MLB | 10:09 am, 5/12/18 |
| Dan Vogelbach | Scranton Yankees | ADD | to A | 2:29 pm, 5/11/18 |
| Ronald Guzman | The Red Barons | ADD | to MLB | 11:32 am, 5/11/18 |
| Micker Adolfo | Hill Valley Preservation Society | ADD | to AA | 10:42 am, 5/11/18 |
| Daniel Palka | Purple Cobras | ADD | to AAA | 4:55 am, 5/11/18 |
| Welington Castillo | Purple Cobras | ADD | to MLB | 2:53 pm, 5/10/18 |
| Jonathan Loaisiga | The Bluth Company | ADD | to AA | 1:37 pm, 5/10/18 |
| Manny Pina | Geckos | ADD | to MLB | 9:57 am, 5/10/18 |
| Erasmo Ramirez | Geckos | ADD | to MLB | 9:52 am, 5/10/18 |
| Ryan Yarbrough | Geckos | ADD | to MLB | 9:52 am, 5/10/18 |
| Jason Hammel | The Red Barons | ADD | to MLB | 9:01 am, 5/10/18 |
| Gabriel Arias | The Red Barons | ADD | to A | 10:10 pm, 5/9/18 |
| Mychal Givens | The Red Barons | ADD | to | 1:24 pm, 5/9/18 |
| Jurickson Profar | Hill Valley Preservation Society | ADD | to MLB | 10:30 pm, 5/8/18 |
| Mike Fiers | Geckos | ADD | to MLB | 3:04 am, 5/8/18 |
| Jen-Ho Tseng | Geckos | ADD | to MLB | 3:04 am, 5/8/18 |
| Seranthony Dominguez | Chinballs | ADD | to AAA | 9:42 pm, 5/7/18 |
| Chad Pinder | Supreme Clientele | ADD | to MLB | 4:34 pm, 5/7/18 |
| Jonathan Arauz | The Bluth Company | ADD | to A | 3:44 pm, 5/7/18 |
| Franmil Reyes | Nixon's Nasty Ninjas | ADD | to AAA | 1:34 pm, 5/7/18 |
| Wilmer Difo | The Red Barons | ADD | to MLB | 9:21 am, 5/7/18 |