| Player | Team | Action | Details | |
|---|---|---|---|---|
| Jonathan Arauz | Ye Olde Tom Toolshed | ADD | to A | 12:25 pm, 5/15/18 |
| Seung-hwan Oh | Purple Cobras | ADD | to MLB | 8:54 am, 5/15/18 |
| Justin Anderson | Hill Valley Preservation Society | ADD | to MLB | 6:02 am, 5/15/18 |
| Bubba Thompson | The Bluth Company | ADD | to A | 1:43 am, 5/15/18 |
| Justin Anderson | The Bluth Company | ADD | to AAA | 12:23 am, 5/15/18 |
| Jim Johnson | Cowboys From Hell | ADD | to MLB | 8:05 pm, 5/14/18 |
| Braden Shipley | Supreme Clientele | ADD | to AAA | 7:27 pm, 5/14/18 |
| Bubba Thompson | The Bluth Company | ADD | to A | 7:10 pm, 5/14/18 |
| Matt Szczur | Geckos | ADD | to MLB | 4:18 pm, 5/14/18 |
| Robbie Grossman | Geckos | ADD | to MLB | 4:17 pm, 5/14/18 |
| Wade LeBlanc | Purple Cobras | ADD | to MLB | 7:56 am, 5/14/18 |
| Bruce Rondon | The Red Barons | ADD | to MLB | 6:12 am, 5/14/18 |
| Blake Parker | Geckos | ADD | to MLB | 1:16 am, 5/14/18 |
| Nick Solak | Purple Cobras | ADD | to AA | 9:01 pm, 5/13/18 |
| Cam Bedrosian | Geckos | ADD | to MLB | 8:49 pm, 5/13/18 |
| Travis Jankowski | The Red Barons | ADD | to MLB | 6:01 pm, 5/13/18 |
| Nicky Delmonico | Bridge Four | ADD | to MLB | 1:05 pm, 5/13/18 |
| Danny Valencia | Bridge Four | ADD | to MLB | 12:53 pm, 5/13/18 |
| Sal Romano | Chinballs | ADD | to MLB | 12:35 pm, 5/13/18 |
| Ryan Pressly | Chinballs | ADD | to MLB | 12:34 pm, 5/13/18 |
| Wilmer Flores | Chinballs | ADD | to MLB | 12:33 pm, 5/13/18 |
| 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 |