Keeling Pilaro is a 13-year old New York lad. And he’s a star athlete. Not in football or baseball or basketball (or any other sport to which teen-age boys typically gravitate). He plays girl’s field hockey. And he dominates. In fact, as an eighth-grader last season, Keeling made all conference, after scoring 10 goals and assisting on 8 others. He was a man among girls. That’s what prompted school officials inSuffolk County, N.Y.to consider whether to bar Keeling from suiting up for this year’s field hockey season. “It’s a girls’ sport,” said the school section’s executive director. “When a boy...