BROOKLYN - Brooklyn residents are being urged to stay on the lookout for a scam artist who is allegedly pretending to be a fundraiser for the Grace Gravesend Athletic Association.Frank Lopiccolo, the executive director of the association, says he's been getting complaints since October of last year from people throughout Brooklyn who say that a man would knock on their door asking for donations for the Gil Hodges Little League, which is operated by the Grace Gravesend Athletic Association.According to Lopiccolo, the suspect is not affiliated with the association. So far, he allegedly scammed at least one person out of $70. Association officials say they never ask for donations by going door-to-door.Anyone who encounters the suspect is asked to call police. He is described as a man in his late 20s or early 30s with dark hair. He is usually well-dressed and carries a clipboard.