Former light heavyweight world titlist Antonio Tarver tested positive for the anabolic steroid Drostanolone following his June 2 cruiserweight bout with Lateef Kayode in Carson, California. Tarver tested positive for the drug Drostanolone, an anabolic steroid.

The fighter is the third high-profile sportsman to test positive for a banned substance in recent weeks after Lamont Peterson and Andre Berto.

“We had a brief conversation and he said that the commission had gotten back the drug test results and that Tarver’s was dirty,” Steve Feder, Kayode’s manager, said on his call with Che Guevara, the chief inspector for the California commission. “I didn’t know the substance at the time and they were notifying the people they had to notify, so I felt like I had to give the commission time to do their job and that I wouldn’t say anything until I got the confirmation of the drug.”

“Today’s news of a false positive caught me, as well as my family and supporters by surprise. I apologize for the embarrassment it caused,” Tarver said in the statement. “I’ll appeal and submit to the California commission everything that I’ve consumed prior to June 2 that could of caused this honest mistake.

“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.”