| Player | Team | Action | Details | |
|---|---|---|---|---|
| Martin Perez | Kimble's Kids | ADD | to MLB | 1:21 pm, 4/13/21 |
| Matt Harvey | Kimble's Kids | ADD | to MLB | 1:21 pm, 4/13/21 |
| Taylor Hearn | Kimble's Kids | ADD | to MLB | 1:21 pm, 4/13/21 |
| Michael Fulmer | Chinballs | ADD | to MLB | 12:48 pm, 4/13/21 |
| Lou Trivino | Chinballs | ADD | to MLB | 12:48 pm, 4/13/21 |
| Jake Diekman | Cowboys From Hell | ADD | to MLB | 8:25 am, 4/13/21 |
| Wilmer Flores | Geckos | ADD | to MLB | 4:45 pm, 4/12/21 |
| Dan Vogelbach | Geckos | ADD | to MLB | 4:45 pm, 4/12/21 |
| Brandon Williamson | Geckos | ADD | to NA | 4:44 pm, 4/12/21 |
| Victor Caratini | Bullet Club | ADD | to MLB | 3:48 pm, 4/12/21 |
| Tyler Naquin | Supreme Clientele | ADD | to MLB | 10:31 pm, 4/11/21 |
| Johan Oviedo | The Bluth Company | ADD | to AA | 4:18 pm, 4/11/21 |
| Kevin Ginkel | Shaolin Schmeckles | ADD | to MLB | 1:04 pm, 4/11/21 |
| Jon Lester | Shaolin Schmeckles | ADD | to MLB | 1:02 pm, 4/11/21 |
| Mike Fiers | Shaolin Schmeckles | ADD | to MLB | 1:01 pm, 4/11/21 |
| Stefan Crichton | Shaolin Schmeckles | ADD | to MLB | 1:32 pm, 4/10/21 |
| Justin Upton | Undead Rabbits | ADD | to MLB | 1:08 pm, 4/10/21 |
| Avisail Garcia | Undead Rabbits | ADD | to MLB | 1:07 pm, 4/10/21 |
| Miguel Cabrera | Undead Rabbits | ADD | to MLB | 1:06 pm, 4/10/21 |
| Evan Longoria | Undead Rabbits | ADD | to MLB | 1:06 pm, 4/10/21 |
| Asdrubal Cabrera | Undead Rabbits | ADD | to MLB | 1:06 pm, 4/10/21 |
| Dom Nunez | Undead Rabbits | ADD | to AAA | 1:05 pm, 4/10/21 |
| Michael Tauchman | Bullet Club | ADD | to MLB | 6:08 pm, 4/9/21 |
| Stephen Gonsalves | Bullet Club | ADD | to AAA | 12:45 pm, 4/9/21 |
| Connor Brogdon | Purple Cobras | ADD | to AAA | 10:18 am, 4/9/21 |