When did Greg used to like sports and why in the novel, Diary of a Wimpy Kid: Big Shot?

Greg used to like sports in preschool. That was when sports were fun. The first sport he ever played was soccer. He did not know the rules and neither did the other kids. They just had fun together. The referees and the parents just let them do pretty much what they wanted to do on the field. The coaches made sure everyone got a chance to score. Then, after the game, the kids got slushies and junk food.