The UFC heavyweight division is finally showing signs of life. With Jon Jones reportedly stepping away from the sport, a long-stalled weight class is beginning to churn forward. The 33-year-old Brazilian from Salvador has quietly become one of the most avoided problems in the UFC—just ask anyone who’s had to peel him off their back.

Jon Jones has officially retired from mixed martial arts, with UFC president Dana White declaring Tom Aspinall the promotion’s new undisputed heavyweight champion.

UFC President Dana White said Saturday that Jon Jones, the UFC heavyweight champ and former light heavyweight champion, has retired. Tom Aspinall, the former interim champ, is now the UFC's heavyweight champion, White said.