What is a 'cornerback'?

What is a 'cornerback'?

Darrin Chiaverini (Football Coach and Professional Athlete) gives expert video advice on: What is a 'defensive tackle'?; What is a 'defensive end'?; What is a 'nose tackle'? and more...

A corner back is off the nose of the defensive back, and his job is to cover the receivers, but also be a key in the run game. The teams, they cover 2 teams. Their job is not only to make sure they re-route the receivers, but also keep the ball from going outside, and ultimately support the players.