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| 2021-01-08 15:58:00 | San Francisco Golden Gators | Jeffery Fanning | Acquired via waivers | Carson Boling | Waiver |
| 2021-01-08 15:58:00 | Portland Hipsters | Rodney Keo | Acquired via waivers | Paris Vercher | Waiver |
| 2021-01-08 13:22:42 | New York Warriors | Pete Krug | Add/Drop | | |
| 2021-01-08 12:20:34 | Salt Lake City Night Hawks | Gerald Campbell | Add/Drop | | |
| 2021-01-08 08:39:26 | Salt Lake City Night Hawks | | Drop | Andre Schwindt | |
| 2021-01-08 07:54:32 | Baltimore Miners | | Demoted | Mason Graziano | Green Bay Miners |
| 2021-01-08 00:07:28 | Salt Lake City Night Hawks | | Demoted | Antonio Rogers | Toronto Huskies |
| 2021-01-07 23:19:22 | St. Louis 5th Alarm | | Drop | Brady Love | |
| 2021-01-07 23:19:10 | St. Louis 5th Alarm | | Drop | Larry Anderson | |
| 2021-01-07 22:45:22 | Louisville Colonels | | Drop | Michael Smith | |
| 2021-01-07 22:42:30 | Louisville Colonels | | Drop | Owen Stone | |
| 2021-01-07 22:32:50 | Baltimore Miners | | Drop | Jack Merritt | |
| 2021-01-07 21:59:02 | Baltimore Miners | | Drop | Harold Thompson | |
| 2021-01-07 21:52:16 | Baltimore Miners | | Demoted | Henry Knox | Green Bay Miners |
| 2021-01-07 21:49:18 | Baltimore Miners | | Drop | Clifford Little | |
| 2021-01-07 18:23:38 | San Diego Sabercats | | Drop | Louie Sprinkle | |
| 2021-01-07 18:22:12 | San Diego Sabercats | | Drop | Derick Bernal | |
| 2021-01-07 18:09:44 | Louisville Colonels | | Demoted | Claude Rodriguez | Buffalo Bombers |
| 2021-01-07 15:50:00 | New York Warriors | Antonio Rogers | Acquired via trade | 2nd round pick in season 31 | Salt Lake City Night Hawks |
| 2021-01-07 15:50:00 | New York Warriors | 3rd round pick in season 31 | Acquired via trade | 2nd round pick in season 31 | Salt Lake City Night Hawks |
| 2021-01-07 15:30:00 | Baltimore Miners | Mason Graziano | Acquired via trade | 3rd round pick in season 30 | Salt Lake City Night Hawks |
| 2021-01-07 15:30:00 | Baltimore Miners | Freddie Sheets | Acquired via trade | | Salt Lake City Night Hawks |
| 2021-01-07 15:30:00 | Baltimore Miners | Buck Russell | Acquired via trade | | Salt Lake City Night Hawks |
| 2021-01-07 15:20:00 | Vancouver Mounties | | Promoted | Gregory Dowling | Seattle Cougars |
| 2021-01-07 15:20:00 | San Diego Sabercats | Patrick Overton | Acquired via waivers | | Waiver |