In volleyball, DS stands for "defensive specialist". This is a position on the team that is focused on ball control and defense. DS players are typically skilled at passing and digging, and they are essential in defense and serve receive. They may play in any back row position, though they often play left back or middle back. DS players must be mentally strong and have a rock-solid mentality and experience to maintain a positive mentality of their teammates and turn hopeless points into victory. Unlike the libero, a DS can rotate into the front court, spike the ball, and wear a normal colored jersey. They must be subbed into the game like any other typical substitution and cannot replace players freely like the libero can.