Presque Isle Downs has named Frank Stack as its new racing secretary for the rest of the meet. Stack, who has served as the track's clerk of scales for the past three years, replaces Dave Frizzell, who resigned Thursday. . . . . Finger Lakes is expanding superfecta wagering to all races with at least seven betting interests, starting with Tuesday's card. Previously, the western New York track offered superfectas only twice on each card.