| Player | Team | Action | Details | |
|---|---|---|---|---|
| Brandon Finnegan | Nixon's Nasty Ninjas | ADD | to MLB | 12:16 pm, 7/29/21 |
| Dillon Tate | Cowboys From Hell | ADD | to MLB | 7:05 am, 7/29/21 |
| Tyler Duffey | Shaolin Schmeckles | ADD | to MLB | 5:08 am, 7/29/21 |
| Alex Colome | Shaolin Schmeckles | ADD | to MLB | 5:08 am, 7/29/21 |
| Tyler Clippard | Shaolin Schmeckles | ADD | to MLB | 5:07 am, 7/29/21 |
| Ji-Man Choi | Purple Cobras | ADD | to MLB | 5:05 am, 7/29/21 |
| Masyn Winn | The Bluth Company | ADD | to AA | 12:30 am, 7/29/21 |
| Wilmer Flores | Purple Cobras | ADD | to MLB | 5:40 pm, 7/28/21 |
| Jordan Holloway | Shaolin Schmeckles | ADD | to MLB | 3:54 am, 7/28/21 |
| Abraham Toro | Shaolin Schmeckles | ADD | to AA | 1:12 am, 7/28/21 |
| Nestor Cortes | Purple Cobras | ADD | to MLB | 8:08 pm, 7/27/21 |
| Elehuris Montero | The Bluth Company | ADD | to AA | 10:55 am, 7/27/21 |
| Rougned Odor | The Red Barons | ADD | to MLB | 9:31 am, 7/27/21 |
| Rich Hill | Undead Rabbits | ADD | to MLB | 1:01 am, 7/27/21 |
| Tyrone Taylor | Purple Cobras | ADD | to MLB | 6:01 pm, 7/26/21 |
| Darren McCaughan | Purple Cobras | ADD | to AAA | 11:22 am, 7/26/21 |
| Taj Bradley | The Bluth Company | ADD | to A | 10:56 am, 7/26/21 |
| Tucupita Marcano | The Red Barons | ADD | to MLB | 8:15 am, 7/26/21 |
| Johan Oviedo | Supreme Clientele | ADD | to MLB | 2:15 pm, 7/25/21 |
| Ji-Man Choi | Purple Cobras | ADD | to MLB | 8:49 am, 7/25/21 |
| Bubba Thompson | Bullet Club | ADD | to AAA | 8:17 am, 7/25/21 |
| Paolo Espino | Shaolin Schmeckles | ADD | to MLB | 4:51 am, 7/25/21 |
| Joely Rodriguez | The Red Barons | ADD | to MLB | 9:34 pm, 7/24/21 |
| Aeverson Arteaga | The Bluth Company | ADD | to A | 9:30 pm, 7/24/21 |
| Sergio Romo | Shaolin Schmeckles | ADD | to MLB | 7:14 pm, 7/24/21 |