控後 - PG, which is point guard. Main job is bring the ball up the court and distribute to your team-mate. Usually is the person who pass and dribble the best.
Since PG has the ball most of the time, he has to be careful with the ball, high assit to turn-over ratio is always a good way to know if he is a good point guard or not.
Quicker the better, you need to be able to penetrate into the paint area, and distribute the ball out to teammate in scoring position.