UFC light heavyweight champion Jon Jones announced Tuesday that he has entered a drug treatment facility.

The announcement came just days after Jones defeated Daniel Cormier on Saturday in the main event of UFC 182 at the MGM Grand Garden in a five-round decision that left many considering him as the greatest mixed martial arts fighter of all time.
— Kevin Iole

Drugs and alcohol have been an issue in the sports world for some time. Take a look at 30 athletes who have struggled with drugs or alcohol.

(Caption and list courtesy of Drugabuse.com)