Shortly after the Mitchell Report came out, Naulty wrote an article for the "New York Daily News" detailing his drug use. He said he had access to, but did not use, steroids as far back as high school. Shortly after being drafted, he realized that in order to compete, he needed to throw harder, and add muscle to his thin 6'6" frame. Thus, he began taking anabolic steroids and amphetamines, and soon went from 185 pounds to 240, and added ten miles per hour to his fastball. The 1998 groin injury he attributes to having added more muscle to the major tendon in his groin than it is equipped to handle. Therefore, shortly after his trade to the Yankees, he began taking HGH.