Pro Football Journal: Pittsburgh Steelers' Career Years—Top Twenty
James Harrison (American football) - Wikipedia
REPORT - Steelers Super Bowl Champion Clark Haggans Dies At 46
Sports News, Sports, Jobs - Times Observer
Super Bowl Champion Clark Haggans Dies at 46
Warner on point with performance, review
Former Pittsburgh Steelers Linebacker Clark Haggans Dies at 46
Longtime Pittsburgh Steelers linebacker Clark Haggans dies at 46
Clark Haggans, American Football Database
Clark Haggans, longtime NFL linebacker who won a Super Bowl with