Horse racing became popular in Philadelphia in the mid-1700s, and successful horses continue to be bred in the Philadelphia area. William Penn, the founder of Philadelphia and Pennsylvania, reportedly raced his horses down the streets of Philadelphia. Man o' War, owned by Philadelphia-area businessman Samuel D. Riddle was named the horse of the century by The Blood-Horse magazine. Riddle also owned Triple Crown-winning horse War Admiral. In 2004, Smarty Jones, who was bred in the Philadelphia area, won the Kentucky Derby and the Preakness Stakes. Other horses with ties to the area include Afleet Alex, Barbaro, Hard Spun, and Lil E. Tee. Parx Casino and Racing hosts numerous horse races, including the Pennsylvania Derby, the Cotillion Handicap, and the Greenwood Cup Stakes. The Atlantic City Race Course also hosts horse racing.