In February 1963, George Halas hired Stydahar as defensive line coach for the Chicago Bears. Stydahar was credited with overhauling the Bears defensive line, helping to lead the 1963 Bears to the best scoring defense in the NFL and an NFL championship. The Bears dropped to sixth place in the Western Division in 1964, and Stydahar resigned from his position with the club at the end of the 1964 season in order devote his efforts to his work for a corrugated carton company.