Umpires, referees, and other sports officials are related sports positions that only require a high school diploma or equivalent. These officials oversee sporting events to ensure that rules are followed and players are safe. Athletic trainers, dietitians and nutritionists are also related careers, but require a bachelor’s degree. Athletic trainers also work with athletes, but treat injuries and use various techniques to prevent injuries. Dietitians and nutritionists help clients, which can include athletes, obtain a healthier lifestyle through proper nutrition. They may teach clients how to use food to manage illness or to reach a particular health or fitness goal.