After 13 seasons, Brian Urlacher has called it a career. Urlacher spent his whole career playing middle linebacker for the Chicago Bears. He became a free agent after the two sides could not agree on a contract. Urlacher had 1,052 tackles, 41.5 sacks and 22 interceptions. He ranks up there with Dick Butkus as legendary Bear linebackers and should be a first ballot Hall of Famer.