With the announcement of Jon Jones' retirement from the sport, Jones vs. Tom Aspinall has officially become one of MMA's greatest "what ifs."

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."