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| 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 |
| 2021-05-28 11:22:48 | Indianapolis Tornadoes | | Demoted | Sylvester Dixon | Buenos Aires Eagles |
| 2021-05-28 11:08:44 | Buenos Aires Eagles | | Promoted | Curtis Cho | Indianapolis Tornadoes |
| 2021-05-27 23:21:26 | Portland Hipsters | | Drop | Kody Gibbs | |
| 2021-05-25 00:57:26 | South Dakota Blackhawks | | Promoted | Ricky Stanzi | Philadelphia Assassins |
| 2021-05-25 00:56:52 | Philadelphia Assassins | Rodney Cartrette | Add/Drop | Daniel Richardson | |
| 2021-05-25 00:55:02 | Philadelphia Assassins | | Demoted | Ricky Stanzi | South Dakota Blackhawks |
| 2021-05-24 20:00:58 | Santiago Sharks | | Promoted | Elijah Harris | San Diego Sabercats |
| 2021-05-24 19:26:32 | San Diego Sabercats | | Demoted | Michael Arnold | Santiago Sharks |
| 2021-05-24 09:34:40 | Santiago Sharks | | Promoted | Sonny Kincaid | San Diego Sabercats |
| 2021-05-23 14:59:08 | Cleveland Weasels | | Demoted | Oscar Barton | Pittsburgh Berserkers |
| 2021-05-17 19:14:10 | Hartford Hebrew Hammers | | Promoted | Kelly Crist | New York Warriors |
| 2021-05-17 19:13:38 | New York Warriors | | Demoted | Joshua Childress | Hartford Hebrew Hammers |
| 2021-05-17 10:10:26 | Las Vegas Dark Knights | | Demoted | Luke Crane | Knoxville Wampus Cats |
| 2021-05-16 03:41:22 | New York Warriors | | Demoted | Jaymes Stewart | Hartford Hebrew Hammers |
| 2021-05-16 03:41:06 | Hartford Hebrew Hammers | | Promoted | Joshua Childress | New York Warriors |