why is it called a quarterback

The term "quarterback" in American football originates from the player's position on the field. The quarterback stands a quarter of the way back from the line of scrimmage, behind the center, and between the halfback and the fullback. This naming reflects the fractional distance from the line of scrimmage, where the quarterback is positioned closer than the halfback, who stands halfway back, and the fullback, who is further back. The term dates back to the late 19th century, around 1876, when the position was first established in American football, evolving from early rugby formations and field positioning terminology. The quarterback's role as the central player who receives the snap and directs plays solidified along with this positional naming.