The Texas Thoroughbred Association (TTA) has named Tracy Sheffield as the new executive director effective Jan. 1, replacing Mary Ruyle, who will stay on through July to help with the transition, according to a TTA press release on Thursday. The holder of an Animal Science degree from Oregon State University, Sheffield is the founder and managing partner of T&L Veterinary Business Consulting. She has been a TTA member for more than 20 years and is active with the organization's Paddock Foundation, which helps find second careers for retired racehorses. Sheffield...