Picked for the school team

"Dad, dad!" cried Philip, as he arrived home one evening. "I think I've been  selected for the school football team."  "That's good," said his father. "But why do you only think you've been  selected? Aren't you sure? What position are you playing?" "Well," replied Philip, "it's not been announced officially, but I overheard  the football coach tell my teacher that if I was in the team I'd be a great  draw-back."