Defensive position in American and Canadian football, covering receivers, to defend against pass offenses and make tackles
A cornerback (CB) is a member of the defensive backfield or secondary in gridiron football. Cornerbacks cover receivers most of the time, but also blitz and defend against such offensive running plays as sweeps and reverses. They create turnovers through hard tackles, interceptions, and deflecting forward passes. Other members of the defensive backfield include strong and free safeties. The corner... Wikipedia