Brockle Snar retires – UFC caters Smorgasbord for Sweden – Bellator Welterweight tournament additions
| Brock Lesnar | Retired from MMA (unofficial) | Dec. 31 |
| Shawn Jordan | Signed by UFC - 265 | Jan. 2 |
| Thiago Silva | Suspension lifted by NSAC | Jan. 2 |
| Carlos Alexandre Pereira | Signed by Bellator (170 tourney) | Jan. 3 |
| JJ Ambrose | Signed by Bellator (170 tourney) | Jan. 3 |
| Karl Amoussou | Signed by Bellator (170 tourney) | Jan. 3 |
| Nick Penner | Signed by UFC - 205 | Jan. 4 |
| Gerald Harris | Signed by Legacy FC - 185 | Jan. 4 |
| Estevan Payan | Signed by Strikeforce - 155 | Jan. 4 |
| Max Holloway | Signed by UFC - 145 | Jan. 5 |
| Magnus Cedenblad | Signed by UFC - 185 | Jan. 5 |
| Jorgen Kruth | Signed by UFC - 205 | Jan. 5 |
| Besam Yousef | Sigend by UFC - 170 | Jan. 5 |
| CJ Keith | Signed by UFC - 155 | Jan. 5 |
| Bryan Baker | Re-Signed by Bellator (170 tourney) | Jan. 6 |
| Jared Papazian | Signed by UFC - 135 | Jan. 6 |
