My DS13 hates ball sports and always has hated them (he does karate). I think mainly he just doesn't see the point of chasing a ball around (his mind seeks more productive or problem solving activities). Last year he joined the local middle school Brain Bowl team. He LOVES it. Not exactly a sport, but a place he can go to compete intellectually. The kids on the team are like minded, and share a lot of laughs at the practices. I'm not sure if many schools offer the activity at the elementary level, but might be something to look into???