Decelerator is a 16 year old mare and has raced from 2009 to 2011. She was sired by Dehere out of the Accelerator mare Paris Rose. She was trained by D. Wayne Lukas and has raced for Westrock Stables LLC, and was bred in Kentucky, United States by Ted O'Neill. Decelerator has raced at Churchill Downs, Keeneland, Oaklawn Park, Pimlico Race Course, Saratoga with wins at Churchill Downs, Oaklawn Park. Her stakes wins include wins in the 2010 Instant Racing (LS), 2010 Martha Washington (LS), and the 2009 Debutante (G3).