Jockey Oscar Ceballos won the 1,000th Thoroughbred race of his career Wednesday at the Downs at Albuquerque, when he guided Golden Chain to at 2 1/4-length win in the seventh race. Ceballos rode Golden Chain ($8.20) for owner-trainer Rey Marquez. Ceballos rode his first winner on June 28, 1986. He has had 6,953 Thoroughbred mounts, and they have earned $5.2 million.