| UFC Fight Night | 02/10 22:35 | - | Devin Clark v Marcin Prachnio | 0-1 | |
| UFC | 07/08 23:35 | - | Vitor Petrino v Marcin Prachnio | 1-0 | |
| UFC Fight Night | 02/19 00:45 | - | William Knight v Marcin Prachnio | 0-1 | |
| UFC Fight Night | 04/23 22:25 | - | Marcin Prachnio v Philipe Lins | 0-1 | |
| UFC Fight Night | 06/26 18:35 | - | Marcin Prachnio v Villanueva, Isaac | 1-0 | |
| UFC | 01/24 01:00 | - | Rountree, Khalil v Marcin Prachnio | 0-1 | |
| UFC Fight Night | 08/23 01:45 | - | Rodriguez, Mike v Marcin Prachnio | 1-0 | |
| UFC Fight Night | 09/15 15:30 | 1 | Magomed Ankalaev v Marcin Prachnio | 1-0 |