Teenagers who play high school football are three times more likely to be injured than those in other sports, according to statistics. USA Football estimates there are 3,000,000 youth football players in the United States. Knee, ACL, shoulder and various other injuries are common, but concussions are the most common. According to the Journal of the American Medical Association, 57% of high school football players suffer a concussion during practice — when most injuries occur. Alex Okun, 16, who plays for Wayne Valley in New Jersey, injured his shoulder in a 2018 game, although he too said most injuries occur during practice.