In just less than a week, thousands of Derby-goers will pass under a 36 foot-long mural in the heart of the clubhouse at Churchill Downs depicting every jockey to win one of the first 130 editions of the GI Kentucky Derby. The hand behind this Churchill Downs fixture may be unknown to many passers-by, but generations of racing fans quickly recognize the inscribed signature--Peb. Artwork from Eclipse winner Pierre 'Peb' Bellocq is displayed at racetracks across the country, from Churchill Downs and Keeneland to Arlington, Del Mar, Oaklawn, Belmont, Aqueduct...