| Player | Team | Action | Details | |
|---|---|---|---|---|
| Austin Allen | Purple Cobras | ADD | to AAA | 7:33 am, 8/10/21 |
| Blaze Jordan | Purple Cobras | ADD | to A | 7:04 am, 8/10/21 |
| Aledmys Diaz | Purple Cobras | ADD | to MLB | 6:27 am, 8/10/21 |
| Connor Joe | Purple Cobras | ADD | to AAA | 5:02 am, 8/9/21 |
| Chad Kuhl | The Red Barons | ADD | to MLB | 8:25 am, 8/8/21 |
| Zack Britton | The Red Barons | ADD | to MLB | 8:25 am, 8/8/21 |
| Elias Diaz | Purple Cobras | ADD | to MLB | 5:08 am, 8/8/21 |
| Carlos Santana | Purple Cobras | ADD | to MLB | 3:10 am, 8/7/21 |
| Aledmys Diaz | The Bluth Company | ADD | to MLB | 1:56 pm, 8/6/21 |
| Aaron Ashby | The Red Barons | ADD | to AA | 11:58 pm, 8/5/21 |
| Griffin Conine | Shaolin Schmeckles | ADD | to AAA | 11:39 pm, 8/5/21 |
| Hyun-il Choi | Chinballs | ADD | to AAA | 9:31 pm, 8/5/21 |
| Justin Steele | Undead Rabbits | ADD | to AAA | 7:57 pm, 8/5/21 |
| Mickey Moniak | Shaolin Schmeckles | ADD | to AA | 7:06 pm, 8/5/21 |
| Alex Dickerson | Purple Cobras | ADD | to MLB | 11:16 am, 8/5/21 |
| Matt Harvey | Undead Rabbits | ADD | to MLB | 5:29 pm, 8/4/21 |
| Sean Hjelle | Geckos | ADD | to AA | 10:54 am, 8/4/21 |
| Vladimir Gutierrez | Purple Cobras | ADD | to AAA | 5:25 am, 8/4/21 |
| Jose Ramos | The Bluth Company | ADD | to A | 4:25 pm, 8/3/21 |
| Jhailyn Ortiz | Undead Rabbits | ADD | to AA | 2:24 pm, 8/3/21 |
| Blaze Jordan | The Red Barons | ADD | to A | 1:18 pm, 8/3/21 |
| Wilmer Flores | Purple Cobras | ADD | to MLB | 6:29 am, 8/3/21 |
| Sam Hilliard | Chinballs | ADD | to MLB | 4:05 pm, 8/2/21 |
| Jahmai Jones | Chinballs | ADD | to AAA | 4:04 pm, 8/2/21 |
| Seth Lugo | Chinballs | ADD | to MLB | 4:03 pm, 8/2/21 |