Former jockey and racing official William E. Stallings, 65, died Tuesday following a heart attack. Stallings, a Colorado state high school wrestling champion, began his riding career in 1963. Stallings was the Turf Paradise jockey of the year in 1975 and Arizona rider of the year in 1980 in his final year of riding. He was also one of the winningest jockeys on the Northern California fair circuit in the 1960s and 70s. After retiring as a rider, Stallings qualified as a steward in Arizona, California, Oregon, Washington and Idaho, working 17 years before his retirement. A memorial service is scheduled Monday at 10 a.m. at the Sun Lakes, Ariz., Methodist Chapel.