Cannon and HS--the question was whether a *parent* should talk to the player, not whether a coach should talk to the player.
There's a sophomore on the HS Varsity team who is also on my U16 LL team. I have been hearing from DD and another kid that this girl who was always kind of quiet gas turned into a complainer/Debbie downer. Whenever one if the other players asks her for help with the equipment she always blows them off. When another player is having trouble at bat or boots a ball in the field, she is quick to dump on her.