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| 2021-05-30 15:28:36 | San Antonio Brothas | Todd Stern | Add/Drop | Mark Batterson | |
| 2021-05-30 10:44:08 | Buenos Aires Eagles | | Promoted | Dante Joseph | Indianapolis Tornadoes |
| 2021-05-30 10:42:26 | Indianapolis Tornadoes | | Demoted | Sylvester Dixon | Buenos Aires Eagles |
| 2021-05-29 22:57:46 | South Dakota Blackhawks | | Promoted | Tyler Maddox | Philadelphia Assassins |
| 2021-05-29 22:57:02 | Philadelphia Assassins | | Demoted | Rodolfo Chu | South Dakota Blackhawks |
| 2021-05-29 15:53:34 | Seattle Cougars | | Drop | Theo Stanton | |
| 2021-05-29 01:31:10 | San Diego Sabercats | William Daniels | Add/Drop | Peter McDonald | |
| 2021-05-28 23:37:34 | Portland Hipsters | | Drop | Phillip Luck | |
| 2021-05-28 23:26:26 | Portland Hipsters | | Drop | Alex Park | |
| 2021-05-28 19:15:30 | Buenos Aires Eagles | | Promoted | Sylvester Dixon | Indianapolis Tornadoes |
| 2021-05-28 19:15:14 | Indianapolis Tornadoes | | Demoted | Amir Reed | Buenos Aires Eagles |
| 2021-05-28 19:14:40 | Indianapolis Tornadoes | Amir Reed | Add/Drop | | |
| 2021-05-28 19:14:16 | Indianapolis Tornadoes | | Demoted | Sylvester Dixon | Buenos Aires Eagles |
| 2021-05-28 16:21:52 | Mexico City Aztecs | | Promoted | Lance Freeman | Denver Ferris Wheels |
| 2021-05-28 16:21:34 | Denver Ferris Wheels | | Demoted | Adam Blanton | Mexico City Aztecs |
| 2021-05-28 16:20:58 | Denver Ferris Wheels | Adam Blanton | Add/Drop | Russell Alvarez | |
| 2021-05-28 16:02:00 | Seattle Cougars | Blake Moss | Acquired via trade | Nicholas Greer | Indianapolis Tornadoes |
| 2021-05-28 16:02:00 | Seattle Cougars | 2nd round pick in season 32 | Acquired via trade | 1st round pick in season 31 | Indianapolis Tornadoes |
| 2021-05-28 16:02:00 | Seattle Cougars | Jayson Forbes | Acquired via trade | | Indianapolis Tornadoes |
| 2021-05-28 16:00:00 | Portland Hipsters | 3rd round pick in season 31 | Acquired via trade | 2nd round pick in season 31 | Dallas Hounds |
| 2021-05-28 16:00:00 | Portland Hipsters | Horton Horton | Acquired via trade | | Dallas Hounds |
| 2021-05-28 16:00:00 | Portland Hipsters | 3rd round pick in season 31 | Acquired via trade | | Dallas Hounds |
| 2021-05-28 16:00:00 | Portland Hipsters | 3rd round pick in season 31 | Acquired via trade | | Dallas Hounds |
| 2021-05-28 13:11:26 | Buenos Aires Eagles | | Promoted | Sylvester Dixon | Indianapolis Tornadoes |
| 2021-05-28 13:02:26 | Norfolk Wolves | | Promoted | John Gunderson | Dallas Hounds |