But if they took 15 mg of Dianabol a day for five weeks -- Mix says it might have been three weeks, Shea says six -- it could have given them an advantage, especially if none of their opponents was using. Victor Conte, the BALCO mastermind, says a cycle of that size and length could have given them benefits for "four months or longer." But Charles Yesalis, professor emeritus of health policy and administration at Penn State University and a leading expert on doping, says such doses of Dianabol might have given the players a boost for only up to two months.
Which made Canseco’s second benefactor — Mike Wallace — all the more important. John Hamlin, a producer at 60 Minutes , had gotten a tip about Canseco’s book from a friend at another network. (The friend couldn’t act on it because his employer was a Major League Baseball rights holder.) Hamlin began calling baseball people and confirming the details. Almost no one would talk on the record, but they suggested that Canseco’s account was true. One of the few allegations Hamlin couldn’t verify was Canseco’s insistence that Roger Clemens was juicing.