He was a two-time kingpin at 170 pounds, lost two fights but beat both his conquerors in rematches, and came back from a four-year retirement to choke out a reigning middleweight champ and future Hall of Famer (Michael Bisping) as an encore.

Jon Jones is officially retired from MMA, with his retirement announced by Dana White during the UFC Baku post-event press conference on Saturday. While his departure from the sport was marred by accusations of ducking and a prolonged period of inactivity,

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.