Trainer Graham Motion claimed the top prize of $50,000 in the Maryland Jockey Club's $100,000 trainer bonus, which was offered to horsemen for participation in stakes races over GI Preakness S. weekend at Pimlico. To be eligible for the bonus, trainers had to start a minimum of five horses in the 15 Thoroughbred stakes races. Points were assigned based on finish position--first (10), second (seven), third (five), fourth (three) and fifth through last (one). The trainer with the most points earned $50,000, followed by $25,000 for second, $12,000 for third,...