| Player | Team | Action | Details | |
|---|---|---|---|---|
| Austin Nola | Ye Olde Tom Toolshed | ADD | to MLB | 10:33 am, 9/1/20 |
| Jay Bruce | Purple Cobras | ADD | to MLB | 10:33 pm, 8/31/20 |
| Dexter Fowler | Purple Cobras | ADD | to MLB | 10:33 pm, 8/31/20 |
| James McCann | Purple Cobras | ADD | to MLB | 10:32 pm, 8/31/20 |
| Taylor Clarke | The Red Barons | ADD | to MLB | 6:07 pm, 8/31/20 |
| Samuel Coonrod | Bullet Club | ADD | to MLB | 5:26 pm, 8/31/20 |
| Yoshihisa Hirano | Cowboys From Hell | ADD | to MLB | 5:20 pm, 8/31/20 |
| Rick Porcello | Undead Rabbits | ADD | to MLB | 4:50 pm, 8/31/20 |
| Brent Suter | Undead Rabbits | ADD | to MLB | 4:49 pm, 8/31/20 |
| David Phelps | Undead Rabbits | ADD | to MLB | 4:48 pm, 8/31/20 |
| Michael King | Undead Rabbits | ADD | to AAA | 4:47 pm, 8/31/20 |
| Lenny Torres | Chinballs | ADD | to NA | 12:08 pm, 8/31/20 |
| Scott Barlow | Chinballs | ADD | to MLB | 11:39 am, 8/31/20 |
| Luis Torrens | Supreme Clientele | ADD | to MLB | 10:59 am, 8/31/20 |
| Jamie Barria | Cowboys From Hell | ADD | to MLB | 10:20 pm, 8/30/20 |
| Jeremy Jeffress | Cowboys From Hell | ADD | to MLB | 10:20 pm, 8/30/20 |
| Eric Lauer | Geckos | ADD | to AAA | 10:33 am, 8/30/20 |
| Thomas Szapucki | Supreme Clientele | ADD | to AAA | 6:09 pm, 8/29/20 |
| Taylor Clarke | The Red Barons | ADD | to AAA | 2:40 pm, 8/29/20 |
| Luis Garcia | Bullet Club | ADD | to AA | 2:02 pm, 8/29/20 |
| Ryan Jeffers | Purple Cobras | ADD | to AA | 7:17 am, 8/29/20 |
| Yadier Molina | Purple Cobras | ADD | to MLB | 7:16 am, 8/29/20 |
| Jon Berti | Purple Cobras | ADD | to MLB | 7:16 am, 8/29/20 |
| Brandon Belt | Purple Cobras | ADD | to MLB | 7:15 am, 8/29/20 |
| Tyler Rogers | The Red Barons | ADD | to MLB | 9:37 pm, 8/28/20 |