Former UFC heavyweight champion Brock Lesnar has informed the mixed martial arts promotion that he is retired from competition.
The UFC confirmed the 39-year-old Lesnar's decision Wednesday.
Lesnar returned from a 4½-year MMA absence last July to beat Mark Hunt at UFC 200, but the result was overturned after Lesnar failed two doping tests. He was subsequently suspended from competition for a year by the U.S. Anti-Doping Agency, which administers the UFC's doping policy.
Lesnar's decision to retire means he has been removed from USADA's drug-testing pool, which monitors the fighters year-round.
If he decides to return to competition, he would have to...