Some of baseball’s most cherished storylines of the past decade have been tainted by performance-enhancing drugs, including the accomplishments of record-setting home run hitters and dominating pitchers. Now, players with Boston’s championship teams of 2004 and 2007 have also been linked to doping.
Baseball first tested for steroids in 2003, and the results from that season were supposed to remain anonymous. But for reasons that have never been made clear, the results were never destroyed and the first batch of positives has come to be known among fans and people in baseball as “the list.” The information was later seized by federal agents investigating the distribution of performance-enhancing drugs to professional athletes, and the test results remain the subject of litigation between the baseball players union and the government."

