COMING at us soon is a new stage show about the New York Yankees. The story of a former choirboy turned troublemaker. Confronting him, in 1973, a rescuer throws him into a holding pen in Yankee Stadium. Rescuer George Steinbrenner liked the kid, made him a batboy and he became the Boss’ right-hand man for 36 years. The Kid? Ray Negron. Today he’s a Yankees exec who advises on community relations.