At some tournaments, bases have both arms in the air, feeding the balls with one arm; at others, they have one arm in the air which they feed the balls and the other arm behind their back. When feeding the ball, they must also be aware of a player's preference. Most players accept the standard, which is for the ball boy or girl to gently toss the ball (from the position with their arms extended upwards) such that it bounces one time then to the proper height for the player to catch the ball easily.