Wayward Lass, champion 3-year-old filly of 1981, died the end of June at Gus Schoenborn Jr.'s Contemporary Stallions near Coxsackie, N.Y. "We found her dead in her stall," Schoenborn said about the 25-year-old mare. "She had a heart attack."Bred by Hall of Fame trainer Horatio Luro, Wayward Lass won two-thirds of the New York Filly Triple Crown: The Mother Goose Stakes (gr. I) and the Coaching Club American Oaks (gr. I, by way of disqualification). Her three other stakes wins that year included a victory in the Ruthless Stakes (gr. III). She was retired in the fall of 1981 with nine wins from 25 starts and earnings of $435,237 from two years of racing for owner Flying Zee Stable and trainer Jose Martin."Jose did a fantastic job with her," Schoenborn said. "All the credit goes to him."Schoenborn was given Wayward Lass last July. Wayward Lass (Hail the Pirates--Young Mistress, by Third Martini) was barren at the time, and was in foal to Contemporary stallion City Zip at the time of her death.Wayward Lass, whom Flying Zee sold for $2.35 million while in foal to Noble Nashua at the 1983 Keeneland November breeding stock sale, produced 15 foals, a dozen of whom have won. Her youngest offspring is a 2-year-old Rodeo filly named Wayward Liz.