Backs include the following positions: Quarterback: Generally, the leader of the offence. Calls all plays to teammates, receives the ball from the snap, and initiates the offensive play, usually by passing the ball to a receiver, handing the ball off to another back, or running the ball himself. Fullback: Has multiple roles including pass protection, receiving, and blocking for the running back. Sometimes carries the ball, usually on short yardage situations. Running back (or tailback): As the name implies, the main runner on the team. Also receives passes sometimes, and blocks on pass plays.
Backs include the following positions: Quarterback: Generally, the leader of the offence. Calls all plays to teammates, receives the ball from the snap, and initiates the offensive play, usually by passing the ball to a receiver, handing the ball off to another back, or running the ball himself. Fullback: Has multiple roles including pass protection, receiving, and blocking for the running back. Sometimes carries the ball, usually on short yardage situations. Running back (or tailback): As the name implies, the main runner on the team. Also receives passes sometimes, and blocks on pass plays.