Thank you! If your player is selected for a team, you may ask the Head Coach to be apart of the coaching staff. Assistant Coaches are not declared until the team is created.
In some cases, based on the skill level of a player, it can be predetermined that a coach will know his assistant prior to the tryouts.
A coach will never choose a player only to have their parent as a coach. Each player who is selected will be there because they have show their skill is a match to the level of the team. It will always be in the coaches best interest to select the highest skilled players.