Manny Ramirez has tested positive for performance-enhancing drugs and will be suspended 50 games beginning Thursday, according to a report from the Los Angeles Times. Ramirez, a baseball source told SI.com, explained to baseball officials he was uncertain he was taking a banned substance and may have had a medical reason for using the substance. "Recently I saw a physician for a personal health issue. He gave me a medication, not a steroid, which he thought was okay to give me. Unfortunately, the medication was banned under our drug policy. Under the policy that mistake is now my responsibility. I have been advised not to say anything more for now. I do want to say one other thing; I've taken and passed about 15 drug tests over the past five seasons," Ramirez said in a statement released by the MLBPA.