George J. Mitchell contacted Naulty in January as part of his investigation of performance-enhancing drug use by Major League Baseball players. He is first mentioned on page 232 of the Mitchell Report, and is very candid with his admissions. He is one few former and current baseball players interviewed by investigators to admit to using steroids, beginning in as a minor leaguer and continuing through his major league career. He also admits to using human growth hormone for one year, 1998, to recover from the groin injury. Naulty attributed his willingness to openly discuss his drug use to the remorse he felt. He told investigators, "if I could give back a little bit of something good, then I would like to."