My son plays basketball, flag football (both seasonal) and then soccer pretty much year round. I encourage the parents of my players to keep them in multiple sports (they are U9) I feel like it keeps them shape but also helps the appreciate sports in general. Also its funny you mention rugby, I have heard some folks talking about this but I am also hearing about quite a few kids getting into lacrosse. Soccer has its risks like any other sport but I still am happy my son enjoys it the most, I would prefer he takes the least amount of hits to his head as possible.
