<sod>During the 1969 season, Dierdorf started seven games at right offensive tackle and one at left offensive tackle,<ref name=t69/> and was selected by both the [[Associated Press]] (AP) and [[United Press International]] (UPI) as a first-team player on the [[1969 All-Big Ten Conference football team]].<ref>{{cite news|title=No Hawks Named All-Big Ten|newspaper=The Daily Iowan|page=6|date=November 26, 1969|url=http://dailyiowan.lib.uiowa.edu/DI/1969/di1969-11-26.pdf}}</ref><ref>{{cite news|title=Bucks Head All-Big Ten|newspaper=Oshkosh Daily Northwestern|date=November 28, 1969|page=16|url=https://www.newspapers.com/image/24744248/?terms=phipps%2Badamle%2Bmandich%2Bdierdorf%2Bcurtis%2B%22united%2Bpress%22}}</ref><eod>
<sod>During the 1969 season, Dierdorf started seven games at right offensive tackle and one at left offensive tackle,<ref name=t69/> and was selected by both the [[Associated Press]] (AP) and [[United Press International]] (UPI) as a first-team player on the [[1969 All-Big Ten Conference football team]].<ref>{{cite news|title=No Hawks Named All-Big Ten|newspaper=The Daily Iowan|page=6|date=November 26, 1969|url=http://dailyiowan.lib.uiowa.edu/DI/1969/di1969-11-26.pdf}}</ref><ref>{{cite news|title=Bucks Head All-Big Ten|newspaper=Oshkosh Daily Northwestern|date=November 28, 1969|page=16|url=https://www.newspapers.com/image/24744248/?terms=phipps%2Badamle%2Bmandich%2Bdierdorf%2Bcurtis%2B%22united%2Bpress%22}}</ref> He also received second-team All-American honors from the Central Press.<ref>{{cite news|title=Ohio State Dominates 1969 Central Press Captains All-American Team|author=Walter L. Johns|newspaper=The Gaffney Ledger|date=November 24, 1969|page=5|url=https://www.newspapers.com/clip/3369541/1969_central_press_captains_all_america/}}</ref><eod>