EVERETT, Mass. (AP) -Brian McNamee, the onetime personal trainer for Roger Clemens, resurfaced to give a brief motivational speech to a small group of workout buffs on Thursday but refused to comment on the steroid scandal that landed him and his famous former client in front of Congress.
In his first public comments since testifying that he injected Clemens with steroids and human growth hormone, McNamee gave about 25 high school athletes, coaches and parents a warning about mistakes that can tarnish one's reputation.
``My lifetime of actions can be defined by one singular monumental mistake,'' he said in a 12-minute talk at a friend's supplement store. ``I'm trying to learn from my mistake. I want you to learn from my mistake, and other peoples' mistakes.''
McNamee canceled sit-down interviews with a local television station and Associated Press reporter, saying, ``I've got to think about my kids.''
He did not elaborate, walking away and leaving through the back door as the lights were turned off.
McNamee is a key source for the Mitchell Report that laid bare the prevalence of steroids in baseball. Clemens has denied the allegations.

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