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Joe Morgan showed little tolerance for those who took steroids. Getty

Hall-of-Fame second baseman Joe Morgan has a message to those considering admitting performance-enhancing drug users into Cooperstown: "they don't belong here."

Morgan, who is the Hall of Fame's vice chairman and member of its board of directors, sent an advisory email to several sportswriters who cast votes for the Hall of Fame. He ripped the prospect of letting PED users into baseball's most hallowed institution.

"We hope the day never comes when known steroid users are voted into the Hall of Fame," wrote Morgan. "They cheated. Steroid users don’t belong here."

The 409-paged Mitchell Report, an investigation which was published in December 2007, included perennial All-Stars Barry Bonds, Gary Sheffield and Roger Clemens, among others.

Morgan's letter, which was sent a day after the Hall of Fame released the 33 names on the 2018 ballot, touches on many aspects of the steroid issue. Bonds, Clemens and Sheffield are part of the list of candidates.

Morgan, 74, spent most of his career with the Houston Astros and the Cincinnati Reds' famed "Big Red Machine" in the 1970s. The 10-time All-Star was inducted into the Hall of Fame in 1990.