Karl Stuart Nelson (born June 14, 1960 in DeKalb, Illinois) was an American football offensive tackle in the National Football League for the New York Giants. He was a member of the 1986 Giants team that won Super Bowl XXI. He missed the 1987 season due to illness (Hodgkin's disease). Nelson played college football at Iowa State University. For a time he served as a commentator on Giants radio broadcasts. Nelson currently resides with his family in Northern New Jersey where he works in the financial industry and is an active advocate for various charities.[citation needed]