UFC champion Jon Jones retires after legal troubles

Tom Aspinall is the heavyweight champion,' UFC chief Dana White confirms in Baku. Mixed martial arts (MMA) legend Jon Jones has retired, and interim heavyweight champion Tom Aspinall has been elevated to the undisputed title holder, Dana White, the Ultimate Fighting Championship (UFC) president and CEO, confirmed.

According to UFC CEO Dana White, Jones, 37, informed the promotion of his decision to retire Friday. The UFC had been working toward booking a heavyweight title unification bout between Jones and interim champion Tom Aspinall, but with Jones' sudden retirement, Aspinall is now elevated to undisputed champion.

Tom Aspinall Now The UFC Heavyweight Champion. News Delivered At UFC Baku Post-Fight Press Conference. At Saturday's UFC Baku post-fight press conference in Azerbaijan, UFC CEO Dana White delivered the news that heavyweight champion Jon Jones has retired at the age of 37.