Purdue defensive lineman Dave Butz selected to Hall of Fame
Purdue's Woodson elected to College Hall
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Purdue DT great Dave Butz passes away - On3
Why Dave Butz Left The Cardinals
Dave Butz, All-Pro Defensive Lineman for Washington, Dies at 72 - The New York Times
Who was the Washington Redksins defensive legend Dave Butz? - AS USA
Washington Commanders legend Dave Butz passes away at 72