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.

Marlon N. Humphrey is an American football cornerback for the Baltimore Ravens of the National Football League (NFL). He attended Hoover High School, where he was named to the USA Today All-USA high school football team in 2012 and 2013. During his tenure, he won a silver medal in the 110 metres hurdles at the 2013 World Youth Championships in Donetsk, Ukraine. He also was named as a USA Today All-American Track and Field Team.