The offensive coordinator is in charge of the team's offensive game plan, and typically calls offensive plays during the game, although some offensive-minded head coaches also handle play-calling.

What are the responsibilities of an offensive coordinator?

Reporting to the Head Football Coach, the Offensive Coordinator is responsible for coordinating the offensive unit of the team, including practice and game planning, overall management and coordination of assistant coaches in each offensive position.

Does the coach or QB call plays?

In American football, the quarterback relays to his teammates in the huddle what play the coach has called. The football play is a mental blueprint or diagram for every player on the field. Quarterbacks are also allowed to audibilize, or change the play at the line of scrimmage. A changed play is called an audible.