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| 2021-02-09 18:00:00 | San Francisco Golden Gators | CarlLee Hamilton | Acquired via trade | | Louisville Colonels |
| 2021-02-09 18:00:00 | San Francisco Golden Gators | 3rd round pick in season 30 | Acquired via trade | | Louisville Colonels |
| 2021-02-09 18:00:00 | San Francisco Golden Gators | 3rd round pick in season 31 | Acquired via trade | | Louisville Colonels |
| 2021-02-09 17:04:20 | Louisville Colonels | Christopher Adams | Add/Drop | | |
| 2021-02-09 14:22:06 | Sacramento Rainbow Trout | Eddie Green | Add/Drop | | |
| 2021-02-09 03:56:18 | New York Warriors | | Demoted | Gino Bulloch | Hartford Hebrew Hammers |
| 2021-02-09 03:55:54 | Hartford Hebrew Hammers | | Promoted | Joshua Langham | New York Warriors |
| 2021-02-07 13:10:00 | Philadelphia Assassins | 2nd round pick in season 31 | Acquired via trade | Gino Bulloch | New York Warriors |
| 2021-02-07 13:10:00 | Philadelphia Assassins | Chad Hammond | Acquired via trade | | New York Warriors |
| 2021-02-07 02:31:36 | South Dakota Blackhawks | | Promoted | Jeffrey Knight | Philadelphia Assassins |
| 2021-02-07 02:16:54 | Philadelphia Assassins | | Drop | Ryan Kennedy | |
| 2021-02-06 15:37:48 | Minneapolis Bricklayers | Louis Sanderson | Add/Drop | | |
| 2021-02-06 14:39:40 | Miami Macho Men | | Drop | Brandon Riddle | |
| 2021-02-06 13:02:56 | Baltimore Miners | David Prado | Add/Drop | | |
| 2021-02-05 16:00:00 | Kansas City Wildcats | Aaron Duong | Acquired via waivers | Norman Gonsalez | Waiver |
| 2021-02-05 15:11:16 | San Diego Sabercats | Kenneth Curry | Add/Drop | Dale Fisher | |
| 2021-02-05 12:56:06 | Minneapolis Bricklayers | | Demoted | Warren Rickard | Santo Domingo Lazy Dogs |
| 2021-02-05 12:52:44 | Santo Domingo Lazy Dogs | | Promoted | Rahim Fitzgerald | Minneapolis Bricklayers |
| 2021-02-02 13:48:28 | Atlanta Eels | Alan Lee | Add/Drop | Gary Lovejoy | |
| 2021-02-01 17:43:20 | San Francisco Golden Gators | | Drop | Hugh Seidl | |
| 2021-02-01 13:29:18 | San Antonio Brothas | | Drop | Ben Morel | |
| 2021-02-01 13:06:00 | Kansas City Wildcats | Steven Seagal | Acquired via waivers | James Williams | Waiver |
| 2021-02-01 13:06:00 | Atlanta Eels | Dale Fisher | Acquired via waivers | Gary Lovejoy | Waiver |
| 2021-02-01 12:33:22 | Louisville Colonels | Michael Smith | Add/Drop | | |
| 2021-02-01 12:07:24 | Nashville Night Owls | | Promoted | Henry Caplinger | Miami Macho Men |