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| 2021-08-25 10:41:10 | Milwaukee Sundancers | Christopher Brooks | Add/Drop | | |
| 2021-08-25 10:35:54 | Milwaukee Sundancers | | Drop | Tyler Owens | |
| 2021-08-25 10:01:24 | Milwaukee Sundancers | | Demoted | Noah Florea | Winnipeg Warriors |
| 2021-08-25 09:58:44 | Milwaukee Sundancers | | Demoted | Tyler Owens | Winnipeg Warriors |
| 2021-08-25 09:58:18 | Milwaukee Sundancers | | Demoted | Ryan Herr | Winnipeg Warriors |
| 2021-08-25 02:31:00 | Cincinnati Skyliners | | Demoted | Andrew Morales | Sao Paulo Jackalopes |
| 2021-08-25 02:22:52 | Cincinnati Skyliners | | Demoted | Daniel Allen | Sao Paulo Jackalopes |
| 2021-08-25 02:22:50 | Cincinnati Skyliners | | Demoted | Daniel Allen | Sao Paulo Jackalopes |
| 2021-08-25 02:22:50 | Cincinnati Skyliners | | Demoted | Daniel Allen | Cincinnati Skyliners |
| 2021-08-24 23:08:00 | Orlando Bombers | Roberto Penn | Acquired via waivers | | Waiver |
| 2021-08-24 22:52:00 | Dallas Hounds | Dane Vaden | Acquired via trade | Jason Hancock | New Orleans Hurricanes |
| 2021-08-24 22:52:00 | Dallas Hounds | 2nd round pick in season 32 | Acquired via trade | 2nd round pick in season 32 | New Orleans Hurricanes |
| 2021-08-24 22:50:00 | Boston Bannerman | Steven Brock | Acquired via trade | 2nd round pick in season 33 | Salt Lake City Night Hawks |
| 2021-08-24 22:50:00 | Boston Bannerman | Rick Derringer | Acquired via trade | | Salt Lake City Night Hawks |
| 2021-08-24 19:04:20 | Salt Lake City Night Hawks | Jorge Gividen | Add/Drop | | |
| 2021-08-24 17:52:28 | Salt Lake City Night Hawks | | Drop | Tony Piantik | |
| 2021-08-24 13:57:50 | Miami Macho Men | | Demoted | Ahmad Raber | Nashville Night Owls |
| 2021-08-24 13:48:58 | Nashville Night Owls | | Promoted | Robert Gregory | Miami Macho Men |
| 2021-08-24 13:28:08 | Miami Macho Men | Ahmad Raber | Add/Drop | | |
| 2021-08-24 12:51:58 | Nashville Night Owls | | Promoted | Trevor Brewster | Miami Macho Men |
| 2021-08-24 12:51:26 | Nashville Night Owls | | Promoted | Zachary Bell | Miami Macho Men |
| 2021-08-24 11:04:00 | Philadelphia Assassins | Yonatan Jude | Acquired via waivers | | Waiver |
| 2021-08-24 11:02:00 | Cleveland Weasels | Edward Dupree | Acquired via waivers | | Waiver |
| 2021-08-24 11:00:00 | Cleveland Weasels | Rahim Hughes | Acquired via waivers | | Waiver |
| 2021-08-24 10:58:00 | Orlando Bombers | Kirby Jeanbaptiste | Acquired via waivers | | Waiver |