Husker Magic, who won 105 races from 167 starts — the only Derby Lane dog in history with at least 100 victories— was retired from racing Wednesday, kennel owner Jim Abernathy said. She ranks tied for 33rd on the sport's all-time win list. The female is expected to spend several months at the Abernathy residence in St. Petersburg before going to Grapevine, Ark., to begin a breeding career.