Coaches, let them play other sports.
It is amazing how many years I've heard coaches and Parents bad mouth other sports that they don't want their kids to play. Youth sports, High School is where these kids should be having fun learning a sport and not setting themself for a pro career if they think thats what in store. I not saying that with practice and hard work in the classroom and the field won't payoff, but to be push on one sport can be miss leading. I believe a sport can be like a great fruit which many sports can give you all sorts of favors like in drills and different bodies of knowlege by many coaches. You will never know until you try the fruit.