What is the difference between a running back and a fullback?
In general, a fullback is a much bigger player, physically, than a running back. The fullback’s main responsibility is to block for the running back on running plays. Occasionally the fullback catches a pass, but rarely do they run with the ball. The running back is normally smaller and faster than the fullback. The running back’s primary duty is to run with the ball. Running backs may also be referred to as tailbacks or halfbacks.
