Halfbacks in football are typically players who line up behind the offensive linemen and are responsible for running the ball, catching passes, and blocking. In American football they are also known as running backs. However, there are a variety of other terms used to describe these important players, including tailbacks, wingbacks, flankers, and backs. In rugby, they are typically referred to as center positions or fly-halfs. Regardless of the name used, these players are essential to any successful team and are responsible for gaining yards and scoring points.