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| 2021-06-28 03:23:50 | Denver Ferris Wheels | | Drop | Benny Ward | |
| 2021-06-27 21:09:14 | Boston Bannerman | Lamar Hellmann | Add/Drop | Emmanuel Guidry | |
| 2021-06-27 20:54:00 | Louisville Colonels | Randal Golden | Acquired via trade | 1st round pick in season 31 | San Diego Sabercats |
| 2021-06-27 15:30:08 | Buenos Aires Eagles | | Promoted | M.J. Black | Indianapolis Tornadoes |
| 2021-06-27 15:29:50 | Indianapolis Tornadoes | | Demoted | Alfred Irby | Buenos Aires Eagles |
| 2021-06-27 14:51:00 | Little Rock Fighting Farmers | | Promoted | Victor Rodrigues | San Francisco Golden Gators |
| 2021-06-27 14:50:42 | San Francisco Golden Gators | | Demoted | Devin Ball | Little Rock Fighting Farmers |
| 2021-06-27 14:49:42 | Little Rock Fighting Farmers | | Promoted | CarlLee Hamilton | San Francisco Golden Gators |
| 2021-06-27 14:49:26 | San Francisco Golden Gators | | Demoted | Roland Aldridge | Little Rock Fighting Farmers |
| 2021-06-27 14:49:12 | San Francisco Golden Gators | | Demoted | Scott Mendez | Little Rock Fighting Farmers |
| 2021-06-27 14:48:46 | Little Rock Fighting Farmers | | Promoted | Isaiah Anderson | San Francisco Golden Gators |
| 2021-06-26 11:41:40 | Indianapolis Tornadoes | Roberto Morse | Add/Drop | Elgin Espinoza | |
| 2021-06-26 11:31:36 | Indianapolis Tornadoes | Jared Melton | Add/Drop | Jesus Sapp | |
| 2021-06-26 03:20:44 | Indianapolis Tornadoes | | Demoted | Elgin Espinoza | Buenos Aires Eagles |
| 2021-06-26 03:20:28 | Buenos Aires Eagles | | Promoted | Alfred Irby | Indianapolis Tornadoes |
| 2021-06-24 13:25:42 | Boston Bannerman | Ira Medrano | Add/Drop | David Nixon | |
| 2021-06-23 18:06:22 | Indianapolis Tornadoes | Elgin Espinoza | Add/Drop | | |
| 2021-06-22 20:59:44 | San Juan Devils | | Promoted | Larry Anderson | Phoenix Kangaroos |
| 2021-06-22 20:59:28 | Phoenix Kangaroos | | Demoted | Ruben Brown | San Juan Devils |
| 2021-06-22 20:50:00 | Phoenix Kangaroos | Ruben Brown | Acquired via waivers | Ralph Buckles | Waiver |
| 2021-06-22 20:43:52 | San Antonio Brothas | | Drop | Marty Solomon | |
| 2021-06-21 09:05:44 | South Dakota Blackhawks | | Promoted | Jeffrey Knight | Philadelphia Assassins |
| 2021-06-21 09:05:28 | Philadelphia Assassins | | Demoted | Joseph Smith | South Dakota Blackhawks |
| 2021-06-21 09:05:06 | South Dakota Blackhawks | | Promoted | Ricky Stanzi | Philadelphia Assassins |
| 2021-06-21 09:04:44 | Philadelphia Assassins | | Demoted | Chad Hammond | South Dakota Blackhawks |