Here's a bit of backstory to the current events:

On July 30, 2009, The New York Times reported that Ortiz and then-teammate Manny Ramirez were among a group of over 100 major league players on a list compiled by the federal government, that allegedly tested positive for performance-enhancing drugs during 2003 survey testing. Five months before the Times allegations surfaced, Ortiz stated in an interview that players who tested positive for steroids should be suspended for an entire season. Before the Red Sox's game that afternoon, Ortiz declined to comment on the report, saying, "I'm not talking about that anymore." Afterwards, he confirmed that he'd been told that he was on the list and promised to speak with the media once he "[got] to the bottom of" the matter.

Ten days later, Ortiz held a press conference before a game at Yankee Stadium and denied ever buying or using steroids and suggested the positive test might have been due to his use of supplements and vitamins at the time. When asked which supplements he had been taking, Ortiz said he did not know. Ortiz was accompanied at the press conference by the general counsel of the Major League Baseball Players Association. Because the list of players was seized as part of a government investigation and is currently under court-ordered seal pending the outcome of litigation, Weiner said the players union was unable to provide Ortiz with any details about his test result, including what substance he tested positive for.

On the same day, the Major League Baseball Players Association issued a statement pointing out that because of several factors, any player appearing on the list compiled by the federal government in 2003 did not necessarily test positive for performance enhancing drugs. Among those factors were that the total number of players said to be on the list far exceeded the number of collected specimens that tested positive. In addition, there were questions raised regarding the lab that performed the testing and their interpretation of the positive tests. Also, the statement pointed out that certain legal supplements that were available over the counter at the time could possibly cause a positive test result.

Read more here.

Has Ortiz put his slippery past behind him? Evidence suggests NO: