| UFC | 12/17 01:10 | - | Κέισι Ο'Νιλ v Ariane Lipski | 0-1 | |
| UFC | 03/18 21:55 | - | Jennifer Maia v Κέισι Ο'Νιλ | 1-0 | |
| UFC | 02/13 02:00 | - | Ροξάν Μονταφέρι v Κέισι Ο'Νιλ | 0-1 | |
| UFC Fight Night | 10/02 22:10 | - | Antonina Shevchenko v Κέισι Ο'Νιλ | 0-1 | |
| UFC Fight Night | 06/19 20:00 | - | Lara Procopio v Κέισι Ο'Νιλ | 0-1 | |
| UFC Fight Night | 02/20 23:05 | - | Shana Dobson v Κέισι Ο'Νιλ | 0-1 |