For many people, their passion for racing started with a horse. They watched Zenyatta dance to two Breeders' Cup victories, they had a strong opinion in the rivalry between Affirmed and Alydar or maybe they cheered American Pharoah on to a Grand Slam score when he won the 2015 Classic. For Priscilla Schaefer, her love of racing all started with a backstretch. She was in high school when she attended her first horse race at Emerald Downs outside of Seattle, Washington. Watching as the horses entered the starting gate, Schaefer...