Champion Colt Impresses In Final Churchill Workout Citizen Bull turning in a sparkling workout at Churchill Downs, clocking five furlongs in :58 2/5 as the Kentucky Derby contender showcasing his readiness for Saturday's classic. The reigning 2YO champion, under Derby jockey Martin Garcia, working comfortably through splits of :11 3/5, :23, and :45 4/5 before galloping out six furlongs in 1:12 ...