Slotback, sometimes referred to as an A-back or "slot receiver", is a position in gridiron football. The "slot" is the area between the last offensive lineman on either side of the center and the wide receiver on that side. A player who lines up between those two players and behind the line of scrimmage fills that "slot". The slotback position is a fixture of Canadian football and indoor football, but is also used in American football. The slotback requires a versatile player, who must combine the receiving skills of a wide receiver, the ball-carrying skills of a running back, and the blocking skills of a tight end.