| CID | Name | Position | Valid through |
| 1316450 | alex trebus | OKC_APP | 2018-08-22 |
| 1369388 | Lewis Gilkes | BWI_APP | 2018-08-26 |
| 1185063 | Jeremy Russell | MKE_APP | 2018-08-26 |
| 1332672 | Jonathan Johnson | BUF_APP | 2018-09-04 |
| 1268667 | David Yu | NY_CTR | 2018-09-08 |
| 1374893 | Scott Greene | PHX_APP | 2018-09-11 |