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| 2021-02-26 15:34:00 | Seattle Cougars | Larry Layden | Acquired via trade | 2nd round pick in season 30 | New York Warriors |
| 2021-02-26 15:34:00 | Seattle Cougars | 3rd round pick in season 30 | Acquired via trade | | New York Warriors |
| 2021-02-26 15:32:00 | New York Warriors | 2nd round pick in season 31 | Acquired via trade | Lowell Nielsen | Indianapolis Tornadoes |
| 2021-02-26 15:32:00 | New York Warriors | Brian Parris | Acquired via trade | | Indianapolis Tornadoes |
| 2021-02-26 15:30:00 | Dallas Hounds | 1st round pick in season 30 | Acquired via trade | Marvin Umstead | New York Warriors |
| 2021-02-26 15:30:00 | Dallas Hounds | Austin Wyatt | Acquired via trade | | New York Warriors |
| 2021-02-26 15:20:16 | New York Warriors | Norman Gonsalez | Add/Drop | | |
| 2021-02-26 15:19:26 | New York Warriors | | Demoted | Donald Cornwall | Hartford Hebrew Hammers |
| 2021-02-26 15:03:50 | Hartford Hebrew Hammers | | Promoted | Joseph Jackson | New York Warriors |
| 2021-02-26 14:58:16 | St. Louis 5th Alarm | Kaleb Koss | Add/Drop | | |
| 2021-02-26 14:40:52 | Indianapolis Tornadoes | | Demoted | Lowell Nielsen | Buenos Aires Eagles |
| 2021-02-26 14:18:26 | Caracas Crocodiles | | Promoted | Winston Hoag | St. Louis 5th Alarm |
| 2021-02-26 01:28:16 | Santiago Sharks | | Promoted | Raul Stubblefield | San Diego Sabercats |
| 2021-02-26 01:27:12 | San Diego Sabercats | Gerald Campbell | Add/Drop | | |
| 2021-02-26 01:03:02 | San Diego Sabercats | | Demoted | Raul Stubblefield | Santiago Sharks |
| 2021-02-25 05:28:28 | Boston Bannerman | David Cunningham | Add/Drop | | |
| 2021-02-24 04:36:38 | Kansas City Wildcats | Lee Crenshaw | Add/Drop | Ronnie Morgan | |
| 2021-02-21 12:05:02 | Syracuse River Rats | | Promoted | Shane Evans | Houston Octopods |
| 2021-02-21 12:04:38 | Houston Octopods | | Demoted | Nathan Abrego | Syracuse River Rats |
| 2021-02-20 12:39:26 | Hartford Hebrew Hammers | | Promoted | Donald Cornwall | New York Warriors |
| 2021-02-20 12:39:12 | New York Warriors | | Demoted | Jack Merritt | Hartford Hebrew Hammers |
| 2021-02-19 15:36:00 | Cincinnati Skyliners | Rubin Elwood | Acquired via trade | Bourbon Mayor | Seattle Cougars |
| 2021-02-19 15:36:00 | Cincinnati Skyliners | 2nd round pick in season 31 | Acquired via trade | | Seattle Cougars |
| 2021-02-19 15:36:00 | Cincinnati Skyliners | 3rd round pick in season 30 | Acquired via trade | | Seattle Cougars |
| 2021-02-19 14:23:34 | Louisville Colonels | Cesar Lombardo | Add/Drop | | |