UFC legend Jon Jones, considered the greatest MMA fighter ever, has unexpectedly retired, UFC CEO Dana White announced. This leaves interim champion Tom Aspinall as the undisputed heavyweight champion. Jones, 37, informed the UFC of his decision on Friday, halting plans for a unification bout. White expressed regret for Aspinall's lost time but praised his willingness to fight. Jones's retirement comes after a successful heavyweight title run and amidst controversy, including accusations of avoiding Aspinall and past legal troubles.

Prepared by Emily Rhodes and reviewed by editorial team.