Dr. Joel Fish: The key is to focus on controlling what [factors] you can, and letting go of what you can’t, whether it’s weather conditions, an umpire’s decision or physical [hurts].

Philadelphia sports psychologist Dr. Joel Fish "It's central to our identity," Fish said. It's a loyalty Dr. Fish said is passed down from generation to generation.

Sports physicals check for medical conditions that can interfere with playing sports, such as asthma. A lot can change from year to year.