| CID | Name | Position | Valid through |
| 1411769 | Matthew Rogers | AUS_APP | 2021-04-25 |
| 1215431 | Robert Stecki | MSY_APP | 2021-04-25 |
| 1321911 | Carson Murphy | HNL_CTR | 2021-05-14 |
| 1456690 | Landon Arnett | LEX_APP | 2021-04-22 |
| 1200032 | Logan James | PDX_APP | 2021-04-25 |
| 1490724 | Chase Prickett | MEM_CTR | 2021-04-24 |
| 1252554 | Will Wright | LAX_CTR | 2021-05-07 |
| 1331436 | Peter Krepkiy | DC_CTR | 2021-05-08 |
| 1482683 | Jack Smith | MEM_APP | 2021-05-12 |
| 1422645 | Don Phelps | EVV_APP | 2021-05-12 |
| 1366661 | Henry Grayer | BWI_APP | 2021-05-12 |
| 1437414 | Sport Thomas | MKE_APP | 2021-05-16 |
| 1476924 | Scott Fulkerson | RDU_APP | 2021-05-16 |