Jon Jones

Just days before UFC 200, Interim UFC light heavyweight champion Jon Jones has been pulled from his title unification bout against Daniel Cormier, due to a potential doping violation, reports ESPN.

UFC president Dana White announced the news at an impromptu news conference at MGM Grand Hotel on Wednesday (July 6).

Reports say Jones tested positive for a banned substance in an out-of-competition sample taken June 16 by USADA, though specifics were not revealed.

With Jones-Cormier II now pulled from the card, Brock Lesnar’s comeback fight against dangerous heavyweight Mark Hunt will now headline UFC 200, which takes place on Saturday (July 9) at T-Mobile Arena.

Jones has the right to appeal any positive test, and has never tested positive for performance-enhancing drugs during his career. However, he did test positive for traces of cocaine prior to his fight against Cormier in January 2015.

He’s also just one fight back from a nearly six-month suspension, after his headline-grabbing hit-and-run accident in April 2015.

Jones earned a unanimous decision over Ovince Saint Preux at UFC 197 in April.