Antonio Tarver, the Cruiserweight Contender, has tested positive for the anabolic steroid Drostanolone in a pre-fight urine test conducted by the California State Athletic Commission for his June 2 fight with Lateef Kayode.

“That is correct. Mr. Tarver tested positive for a banned substance,” said George Dodd, the executive officer of the California commission.

“I have always been a proponent of a clean sport and an advocate for the most rigorous drug testing in boxing. … I am confident that my fans will see that I was not at any time attempting to gain an unfair or illegal advantage in my performance,” Tarver said in the statement.