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| 2021-05-04 03:20:02 | San Antonio Brothas | | Drop | Elgin Espinoza | |
| 2021-05-03 18:09:48 | San Francisco Golden Gators | | Drop | Marvin McNutt | |
| 2021-05-03 18:08:34 | San Francisco Golden Gators | | Drop | Johnny Gonzalez | |
| 2021-05-03 18:08:10 | San Francisco Golden Gators | | Drop | Daron Gonsales | |
| 2021-05-03 17:38:56 | San Francisco Golden Gators | | Drop | Albert Reeves | |
| 2021-05-03 17:37:34 | San Francisco Golden Gators | | Drop | Raymond Neuman | |
| 2021-05-03 17:14:36 | Dallas Hounds | Justin Kiehl | Add/Drop | | |
| 2021-05-03 17:12:54 | Dallas Hounds | Tyler Fulton | Add/Drop | | |
| 2021-05-03 17:06:58 | Norfolk Wolves | | Promoted | Brayden Schultz | Dallas Hounds |
| 2021-05-03 17:03:06 | Dallas Hounds | | Drop | Frantz Heitz | |
| 2021-05-03 17:00:10 | Dallas Hounds | | Drop | Thomas Gunn | |
| 2021-05-03 16:59:46 | Dallas Hounds | | Drop | Todd Stern | |
| 2021-05-03 16:46:38 | Norfolk Wolves | | Promoted | Austin Wyatt | Dallas Hounds |
| 2021-05-03 16:22:10 | Dallas Hounds | | Drop | Orlando Best | |
| 2021-05-03 16:20:48 | Indianapolis Tornadoes | | Drop | Jimmy Eckert | |
| 2021-05-03 16:20:18 | Indianapolis Tornadoes | | Drop | Paul Goodlett | |
| 2021-05-03 16:19:06 | Indianapolis Tornadoes | | Drop | David Golden | |
| 2021-05-03 16:06:00 | Mexico City Aztecs | | Promoted | Jason Alexander | Denver Ferris Wheels |
| 2021-05-03 16:02:52 | Denver Ferris Wheels | | Demoted | Jason Alexander | Mexico City Aztecs |
| 2021-05-03 16:01:38 | Mexico City Aztecs | | Promoted | Jason Alexander | Denver Ferris Wheels |
| 2021-05-03 16:00:00 | Phoenix Kangaroos | Jamison Whitaker | Acquired via trade | 2nd round pick in season 31 | New York Warriors |
| 2021-05-03 16:00:00 | Phoenix Kangaroos | Donald Cornwall | Acquired via trade | | New York Warriors |
| 2021-05-03 16:00:00 | Phoenix Kangaroos | Arthur Washer | Acquired via trade | | New York Warriors |
| 2021-05-03 16:00:00 | Phoenix Kangaroos | Ricky Hill | Acquired via trade | | New York Warriors |
| 2021-05-03 15:53:28 | Denver Ferris Wheels | | Drop | Brent Cangelosi | |