Combattants Etats-Unis
| 976 |  | Ian Loveland | 1-2-0 UFC | #4308 |  |
| 977 |  | Ian McCall | 2-3-1 UFC | #2858 | |
| 978 |  | Ike Villanueva | 1-5-0 UFC | #3410 | |
| 979 |  | Ilias Faquiri | #7654 | | |
| 980 |  | Ilima-Lei Macfarlane | 2-2-0 REC | #4666 | |
| 981 |  | Impa Kasanganay | 2-2-0 UFC | #172 | |
| 982 |  | Isaac Dulgarian | 2-2-0 UFC | #2398 | |
| 983 |  | Isaac Vallie-Flagg | 1-3-0 UFC | #4268 | |
| 984 |  | Isaiah Arechiga | 0-1-0 REC | #6871 | |
| 985 |  | Isaiah Diggs | 0-1-0 REC | #5986 | |
| 986 |  | Isaiah Figueroa | 0-1-0 REC | #7321 | |
| 987 |  | Isaiah Flores | 0-1-0 REC | #7269 | |
| 988 |  | Isaiah Hokit | 2-0-0 REC | #4246 | |
| 989 |  | Isaiah Joans | 0-1-0 REC | #7059 | |
| 990 |  | Isaiah Mahto | #7797 | | |
| 991 |  | Isaiah Pinson | 3-3-0 REC | #2067 | |
| 992 |  | Isaiah Skidmore | 0-1-0 REC | #5984 | |
| 993 |  | Isaiah Watkins | #7874 | | |
| 994 |  | Isiah Torres | 1-0-0 REC | #6713 | |
| 995 |  | Israel Aquino | 0-1-0 REC | #6226 | |
| 996 |  | Israel Delgado | 1-1-0 REC | #5712 | |
| 997 |  | Issouf Doumbia | 0-1-0 REC | #5883 | |
| 998 |  | Ivan Salaverry | 3-4-0 UFC | #2940 | |
| 999 |  | Ivan Tena | 0-1-0 REC | #7504 | |
| 1000 |  | J.C. Cottrell | 0-2-0 UFC | #5393 | |