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.

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.

His post comes after UFC president Dana White announced earlier Saturday that Jones officially retired from the promotion, making Tom Aspinall the new heavyweight champion. "Jon Jones called us last night and retired," White told reporters at a press conference. "Jon Jones is officially retired. Tom Aspinall is the heavyweight champion of the UFC."