Kelly Errin Herndon (born November 3, 1976) is a former American football cornerback.

He was originally signed by the San Francisco 49ers as an undrafted free agent in 1999.

The wait included two training camps with the San Francisco 49ers, one with the New York Giants, one season in the XFL, a spring in Barcelona with NFL Europe and one season serving on the Giants’ and Denver Broncos practice squads.

Herndon has been a member of the Las Vegas Outlaws, Barcelona Dragons, New York Giants, Denver Broncos, Seattle Seahawks and Tennessee Titans in his career.

His most notable performance was in Super Bowl XL playing for the Seattle Seahawks, Herndon intercepted a Ben Roethlisberger pass, returning it 76 yards, establishing a new Super Bowl record.