Buddy Ryan, mastermind of NFL defenses, dies at 82
Buddy Ryan, Combative Defensive Genius in the N.F.L., Dies at 85 - The New York Times
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Philadelphia Eagles - Wikipedia
Buddy Ryan, architect of vaunted '85 Bears' defense, dies at 85 – Greeley Tribune
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Buddy Ryan, mastermind of NFL defenses, dies at 82
Buddy Ryan (1934 - 2016), Chicago Bears Super Bowl coach