He played collegiately at Alabama and holds the career record for passes broken up (47).
His father is John Mangum Sr. (1942–1994), a former football player best known as the defensive tackle for the Boston Patriots from 1966 to 1967.
[3] He is the brother of former NFL football player Kris Mangum, best known as the tight end for the Carolina Panthers from 1997 to 2006.
He finished his Bears career with 272 tackles, 4.5 sacks, 5 interceptions, and 2 forced fumbles.
This biographical article relating to an American football defensive back born in the 1960s is a stub.