Dan Dierdorf is an American sportscaster and former professional offensive lineman. A native of Canton, Ohio, Dierdorf played college football for the University of Michigan from 1968 to 1970 and was selected as a consensus first-team All-American in 1970 and a first-team All-Big Ten Conference player in 1969 and 1970.

 Dierdorf played in the NFL with the St. Louis Cardinals for 13 seasons from 1971 to 1983. He was selected by the NFL Players Association as the Offensive Lineman of the Year for three consecutive years from 1976 to 1978. Between 1974 and 1980, he played in the Pro Bowl six times and was chosen as a first-team All-Pro five times. He was named to the NFL 1970s All-Decade Team and was inducted into the Pro Football Hall of Fame in 1996. Since his playing career ended, Dierdorf has worked as a broadcaster. He worked for ABC from 1987 to 1999, including 12 seasons as color analyst on Monday Night Football. He was then part of the NFL on CBS team as an announcer for 15 years from 1999 to 2013. Since 2014, he has been the color analyst for Michigan Wolverines football radio broadcasts. 

He was inducted into the University of Michigan Athletic Hall of Honor in 1996 and the College Football Hall of Fame in 2000. In 2008, Dierdorf received the Pete Rozelle Radio-Television Award from the Pro Football Hall of Fame.